Merge remote-tracking branch 'mih/dev' into sdl-try-2

doc/en/main-page.md

@@ -1,6 +1,8 @@
 # Documentation
 
-Documentation for 0.29.
+Documentation for 0.30 (in development).
+
+[Documentation for 0.29.](https://github.com/MihailRis/voxelcore/blob/release-0.29/doc/ru/main-page.md)
 
 ## Sections
 

doc/en/scripting/builtins/libplayer.md

@@ -89,6 +89,13 @@ player.set_loading_chunks(playerid: int, bool)
 
 Getter and setter of the property that determines whether the player is loading chunks.
 
+```lua
+player.get_interaction_distance(playerid: int) -> float
+player.set_interaction_distance(playerid: int, distance: float)
+```
+
+Getter and setter of the property for max interaction distance.
+
 ``` lua
 player.set_spawnpoint(playerid: int, x: number, y: number, z: number)
 player.get_spawnpoint(playerid: int) -> number, number, number
@@ -135,3 +142,21 @@ player.get_entity(playerid: int) -> int
 ```
 
 Returns unique identifier of the player entity
+
+```lua
+player.get_all_in_radius(center: vec3, radius: number) -> table<int>
+```
+
+Returns an array of player IDs within a sphere with center `center` and radius `radius`.
+
+```lua
+player.get_all() -> table<int>
+```
+
+Returns an array of all active player IDs.
+
+```lua
+player.get_nearest(position: vec3) -> int
+```
+
+Returns the ID of the player closest to the specified position, or nil if there are no players.

doc/ru/main-page.md

@@ -1,6 +1,8 @@
 # Документация
 
-Документация версии 0.29.
+Документация версии 0.30 (в разработке).
+
+[Документация 0.29.](https://github.com/MihailRis/voxelcore/blob/release-0.29/doc/ru/main-page.md)
 
 ## Разделы
 

doc/ru/scripting/builtins/libcompression.md

@@ -0,0 +1,25 @@
+# Библиотека *compression*
+
+Библиотека функций для работы сжатия/разжатия массивов байт
+
+```lua
+-- Сжимает массив байт.
+compression.encode(
+    -- Массив байт
+    data: array of integers, 
+    -- Алгоритм сжатия (поддерживается только gzip)
+    [опционально] algorithm="gzip",
+    -- Вернуть результат в table?
+    [опционально] usetable=false
+) -> array of integers
+
+-- Разжимает массив байт.
+compression.decode(
+    -- Массив байт
+    data: array of integers, 
+    -- Алгоритм разжатия (поддерживается только gzip)
+    [опционально] algorithm="gzip",
+    -- Вернуть результат в table?
+    [опционально] usetable=false
+) -> array of integers
+```

doc/ru/scripting/builtins/libfile.md

@@ -205,4 +205,4 @@ file.open_named_pipe(имя: str, режим: str) -> io_stream
 
 `/tmp/` или `\\\\.\\pipe\\` добавлять не нужно - движок делает это автоматически.
 
-Доступные режимы такие же, как и в `file.open`, за исключением `+`
+Доступные режимы такие же, как и в `file.open`, за исключением `+`

doc/ru/scripting/builtins/libnetwork.md

@@ -93,6 +93,12 @@ socket:is_connected() --> bool
 
 -- Возвращает адрес и порт соединения.
 socket:get_address() --> str, int
+
+-- Возвращает состояние NoDelay
+socket:is_nodelay() --> bool
+
+-- Устанавливает состояние NoDelay
+socket:set_nodelay(state: bool)
 ```
 
 ```lua

doc/ru/scripting/builtins/libplayer.md

@@ -89,6 +89,13 @@ player.set_loading_chunks(playerid: int, bool)
 
 Геттер и сеттер свойства, определяющего, прогружает ли игрок чанки вокруг.
 
+```lua
+player.get_interaction_distance(playerid: int) -> float
+player.set_interaction_distance(playerid: int, distance: float)
+```
+
+Геттер и сеттер свойства, определяющего максимальную дистанцию взаимодействия.
+
 ```lua
 player.set_spawnpoint(playerid: int, x: number, y: number, z: number) 
 player.get_spawnpoint(playerid: int) -> number, number, number
@@ -135,3 +142,21 @@ player.get_entity(playerid: int) -> int
 ```
 
 Возвращает уникальный идентификатор сущности игрока
+
+```lua
+player.get_all_in_radius(center: vec3, radius: number) -> table<int>
+```
+
+Возвращает массив id игроков в пределах сферы с центром `center` и радиусом `radius`.
+
+```lua
+player.get_all() -> table<int>
+```
+
+Возвращает массив id всех активных игроков.
+
+```lua
+player.get_nearest(position: vec3) -> int
+```
+
+Возвращает id ближайшего к указанной позиции игрока, либо nil если игроков нет.

doc/ru/vcm.md

@@ -42,6 +42,8 @@
 
 - `from` - точка начала примитива. Пример: `from (0,0,0)`
 - `to` - противоположная от начала точка. Пример: `to (1,1,1)`
+- `origin` - точка, относительно которой будет применено вращение. По-умолчанию: центр примитива. Пример: `origin (0.5,0.5,0.5)`
+- `rotate` - вращение вокруг осей (x,y,z) в градусах, или кватернион (x,y,z,w). Пример: `rotate (45,0,0)` или `rotate (0.3826834, 0, 0, 0.9238795)`
 - `texture` - отображаемая текстура для всех сторон по-умолчанию.
 - `shading` определяет возможность затенения на примитиве. Пример: `shading off`
 - `delete` удаляет стороны по именам (top, bottom, east, west, north, south)

res/content/base/package.json

@@ -1,6 +1,6 @@
 {
     "id": "base",
     "title": "Base",
-    "version": "0.29",
+    "version": "0.30",
     "description": "basic content package"
 }

res/layouts/pages/settings_display.xml.lua

@@ -53,10 +53,19 @@ function create_checkbox(id, name, tooltip)
     ))
 end
 
+
 function on_open()
     create_setting("camera.fov", "FOV", 1, "°")
     create_setting("display.framerate", "Framerate", 1, "", "", true)
-    create_checkbox("display.fullscreen", "Fullscreen")
+
+    document.root:add(string.format(
+        "<select context='settings' onselect='function(opt) core.set_setting(\"display.window-mode\", tonumber(opt)) end' selected='%s'>"..
+            "<option value='0'>@Windowed</option>"..
+            "<option value='1'>@Fullscreen</option>"..
+            "<option value='2'>@Borderless</option>"..
+        "</select>", core.get_setting("display.window-mode"))
+    )
+
     create_checkbox("camera.shaking", "Camera Shaking")
     create_checkbox("camera.inertia", "Camera Inertia")
     create_checkbox("camera.fov-effects", "Camera FOV Effects")

res/scripts/classes.lua

@@ -44,6 +44,8 @@ local Socket = {__index={
     is_alive=function(self) return network.__is_alive(self.id) end,
     is_connected=function(self) return network.__is_connected(self.id) end,
     get_address=function(self) return network.__get_address(self.id) end,
+    set_nodelay=function(self, nodelay) return network.__set_nodelay(self.id, nodelay or false) end,
+    is_nodelay=function(self) return network.__is_nodelay(self.id) end,
 }}
 
 local WriteableSocket = {__index={

res/scripts/stdlib.lua

@@ -587,6 +587,7 @@ function __process_post_runnables()
         __vc_named_coroutines[name] = nil
     end
 
+    debug.pull_events()
     network.__process_events()
     block.__process_register_events()
     block.__perform_ticks(time.delta())

res/scripts/stdmin.lua

@@ -1,3 +1,144 @@
+local breakpoints = {}
+local dbg_steps_mode = false
+local dbg_step_into_func = false
+local hook_lock = false
+local current_func
+local current_func_stack_size
+
+local _debug_getinfo = debug.getinfo
+local _debug_getlocal = debug.getlocal
+local __pause = debug.pause
+local __error = error
+local __sethook = debug.sethook
+
+-- 'return' hook not called for some functions
+-- todo: speedup
+local function calc_stack_size()
+    local s = debug.traceback("", 2)
+    local count = 0
+    for i in s:gmatch("\n") do
+        count = count + 1
+    end
+    return count
+end
+
+local is_debugging = debug.is_debugging()
+if is_debugging then
+    __sethook(function (e, line)
+        if e == "return" then
+            local info = _debug_getinfo(2)
+            if info.func == current_func then
+                current_func = nil
+            end
+        end
+        if dbg_steps_mode and not hook_lock then
+            hook_lock = true
+
+            if not dbg_step_into_func then
+                local func = _debug_getinfo(2).func
+                if func ~= current_func then
+                    return
+                end
+                if current_func_stack_size ~= calc_stack_size() then
+                    return
+                end
+            end
+            current_func = func
+            __pause("step")
+            debug.pull_events()
+        end
+        hook_lock = false
+        local bps = breakpoints[line]
+        if not bps then
+            return
+        end
+        local source = _debug_getinfo(2).source
+        if not bps[source] then
+            return
+        end
+        current_func = _debug_getinfo(2).func
+        current_func_stack_size = calc_stack_size()
+        __pause("breakpoint")
+        debug.pull_events()
+    end, "lr")
+end
+
+local DBG_EVENT_SET_BREAKPOINT = 1
+local DBG_EVENT_RM_BREAKPOINT = 2
+local DBG_EVENT_STEP = 3
+local DBG_EVENT_STEP_INTO_FUNCTION = 4
+local DBG_EVENT_RESUME = 5
+local DBG_EVENT_GET_VALUE = 6
+local __pull_events = debug.__pull_events
+local __sendvalue = debug.__sendvalue
+debug.__pull_events = nil
+debug.__sendvalue = nil
+
+function debug.pull_events()
+    if not is_debugging then
+        return
+    end
+    if not debug.is_debugging() then
+        is_debugging = false
+        __sethook()
+    end
+    local events = __pull_events()
+    if not events then
+        return
+    end
+    for i, event in ipairs(events) do
+        if event[1] == DBG_EVENT_SET_BREAKPOINT then
+            debug.set_breakpoint(event[2], event[3])
+        elseif event[1] == DBG_EVENT_RM_BREAKPOINT then
+            debug.remove_breakpoint(event[2], event[3])
+        elseif event[1] == DBG_EVENT_STEP then
+            dbg_steps_mode = true
+            dbg_step_into_func = false
+        elseif event[1] == DBG_EVENT_STEP_INTO_FUNCTION then
+            dbg_steps_mode = true
+            dbg_step_into_func = true
+        elseif event[1] == DBG_EVENT_RESUME then
+            dbg_steps_mode = false
+            dbg_step_into_func = false
+        elseif event[1] == DBG_EVENT_GET_VALUE then
+            local _, value = _debug_getlocal(event[2] + 3, event[3])
+            for _, key in ipairs(event[4]) do
+                if value == nil then
+                    value = "error: index nil value"
+                    break
+                end
+                value = value[key]
+            end
+            __sendvalue(value, event[2], event[3], event[4])
+            __pause()
+        end
+    end
+end
+
+function debug.set_breakpoint(source, line)
+    local bps = breakpoints[line]
+    if not bps then
+        bps = {}
+        breakpoints[line] = bps
+    end
+    bps[source] = true
+end
+
+function debug.remove_breakpoint(source, line)
+    local bps = breakpoints[line]
+    if not bps then
+        return
+    end
+    bps[source] = nil
+end
+
+function error(message, level)
+    if is_debugging then
+        __pause("exception", message)
+    end
+    __error(message, level)
+end
+
 -- Lua has no parallelizm, also _set_data does not call any lua functions so
 -- may be reused one global ffi buffer per lua_State
 local canvas_ffi_buffer
@@ -473,8 +614,6 @@ function file.readlines(path)
     return lines
 end
 
-local _debug_getinfo = debug.getinfo
-
 function debug.count_frames()
     local frames = 1
     while true do

res/texts/be_BY.txt

@@ -25,6 +25,7 @@ Grant %{0} pack modification permission?=Выдаць дазвол на мады
 Error at line %{0}=Памылка ў радку %{0}
 Run=Запусціць
 Filter=Фільтр
+Are you sure you want to open the link: =Ці вы ўпэўненыя, што хочаце адкрыць спасылку: 
 
 editor.info.tooltip=CTRL+S - Захаваць\nCTRL+R - Запусціць\nCTRL+Z - Скасаваць\nCTRL+Y - Паўтарыць
 devtools.traceback=Стэк выклікаў (ад апошняга)

res/texts/de_DE.txt

@@ -7,6 +7,7 @@ Back=Zurück
 Continue=Weitermachen
 Add=Hinzufügen
 Converting world...=Weltkonvertierung im Gange...
+Are you sure you want to open the link: =Sind Sie sicher, dass Sie den Link öffnen möchten: 
 
 error.pack-not-found=Paket konnte nicht gefunden werden
 error.dependency-not-found=Die verwendete Abhängigkeit wurde nicht gefunden

res/texts/fi_FI.txt

@@ -19,6 +19,7 @@ Problems=Ongelmia
 Monitor=Valvonta
 Debug=Virheenkorjaus
 File=Tiedosto
+Are you sure you want to open the link: =Haluatko varmasti avata linkin: 
 
 devtools.traceback=Puhelupino (viimeisestä)
 error.pack-not-found=Pakettia ei löytynyt!

res/texts/pl_PL.txt

@@ -7,6 +7,7 @@ Back=Powrót
 Continue=Kontynuacja
 Add=Dodać
 Converting world...=Konwersja świata w toku...
+Are you sure you want to open the link: =Czy na pewno chcesz otworzyć link: 
 
 error.pack-not-found=Nie udało się znaleźć pakietu
 

res/texts/ru_RU.txt

@@ -25,6 +25,7 @@ Grant %{0} pack modification permission?=Выдать разрешение на
 Error at line %{0}=Ошибка на строке %{0}
 Run=Запустить
 Filter=Фильтр
+Are you sure you want to open the link: =Вы уверены, что хотите открыть ссылку: 
 
 editor.info.tooltip=CTRL+S - Сохранить\nCTRL+R - Запустить\nCTRL+Z - Отменить\nCTRL+Y - Повторить
 devtools.traceback=Стек вызовов (от последнего)
@@ -102,6 +103,8 @@ settings.Limit Background FPS=Ограничить фоновую частоту
 settings.Advanced render=Продвинутый рендер
 settings.Shadows quality=Качество теней
 settings.Conflict=Найдены возможные конфликты
+settings.Windowed=Оконный
+settings.Borderless=Безрамочный
 
 # Управление
 chunks.reload=Перезагрузить Чанки

res/texts/uk_UA.txt

@@ -23,6 +23,7 @@ devtools.traceback=Стек викликів (від останнього)
 error.pack-not-found=Не вдалося знайти пакет
 error.dependency-not-found=Використовувана залежність не знайдена
 pack.remove-confirm=Видалити весь контент, що постачається паком/паками зі світу (безповоротно)?
+Are you sure you want to open the link: =Ви впевнені, що хочете відкрити посилання: 
 
 # Меню
 menu.Apply=Застосувати

res/texts/uz_UZ.txt

@@ -24,6 +24,7 @@ Save=Saqlash
 Grant %{0} pack modification permission?=%{0} to‘plamini o‘zgartirish ruxsatini berilsinmi?
 Error at line %{0}=%{0}-qatorida xatolik
 Run=Ishga tushirish
+Are you sure you want to open the link: =Haqiqatan ham havolani ochmoqchimisiz: 
 
 editor.info.tooltip=CTRL+S - Saqlash\nCTRL+R - Ishga tushirish\nCTRL+Z - Bekor qilish\nCTRL+Y - Qayta bajarish
 devtools.traceback=Chaqiruvlar steki (so`nggisidan boshlab)

src/CMakeLists.txt

@@ -91,7 +91,9 @@ target_compile_options(
            /wd4245 # conversion from 'int' to 'const size_t', signed/unsigned
                    # mismatch
            /wd4100 # unreferenced formal parameter
+           /wd4457 # declaration of 'var' hides function parameter 
            /wd4458 # declaration of 'var' hides class member
+           /wd4459 # declaration of 'var' hides global declaration 
            /wd4101 # 'var': unreferenced local variable
            /wd4388 # 'token' : signed/unsigned mismatch
            /wd4018 # '>': signed/unsigned mismatch
@@ -101,6 +103,7 @@ target_compile_options(
            -Wextra
            # additional warnings
            -Wformat-nonliteral
+           #-Wsign-conversion
            -Wcast-align
            -Wpointer-arith
            -Wundef
@@ -108,6 +111,10 @@ target_compile_options(
            -Wno-unused-parameter
            -Wno-sign-compare
            -Wno-unknown-pragmas
+           >
+           $<$<CXX_COMPILER_ID:Clang>:
+           -Wduplicated-branches
+           -Wduplicated-cond
            >)
 
 target_link_options(

src/coders/vcm.cpp

@@ -1,6 +1,8 @@
 #include "vcm.hpp"
 
-#include <iostream>
+#include <algorithm>
+#include <glm/gtc/quaternion.hpp>
+#include <glm/gtc/matrix_transform.hpp>
 
 #include "xml.hpp"
 #include "util/stringutil.hpp"
@@ -73,6 +75,29 @@ static void perform_box(const xmlelement& root, model::Model& model) {
     auto from = root.attr("from").asVec3();
     auto to = root.attr("to").asVec3();
 
+    glm::vec3 origin = (from + to) * 0.5f;
+    if (root.has("origin")) {
+        origin = root.attr("origin").asVec3();
+    }
+
+    glm::mat4 tsf(1.0f);
+    from -= origin;
+    to -= origin;
+    tsf = glm::translate(tsf, origin);
+
+    if (root.has("rotate")) {
+        auto text = root.attr("rotate").getText();
+        if (std::count(text.begin(), text.end(), ',') == 3) {
+            auto quat = root.attr("rotate").asVec4();
+            tsf *= glm::mat4_cast(glm::quat(quat.w, quat.x, quat.y, quat.z));
+        } else {
+            auto rot = root.attr("rotate").asVec3();
+            tsf = glm::rotate(tsf, glm::radians(rot.x), glm::vec3(1, 0, 0));
+            tsf = glm::rotate(tsf, glm::radians(rot.y), glm::vec3(0, 1, 0));
+            tsf = glm::rotate(tsf, glm::radians(rot.z), glm::vec3(0, 0, 1));
+        }
+    }
+
     UVRegion regions[6] {};
     regions[0].scale(to.x - from.x, to.y - from.y);
     regions[1].scale(from.x - to.x, to.y - from.y);
@@ -142,7 +167,7 @@ static void perform_box(const xmlelement& root, model::Model& model) {
         bool enabled[6] {};
         enabled[i] = true;
         auto& mesh = model.addMesh(texfaces[i], shading);
-        mesh.addBox(center, halfsize, regions, enabled);
+        mesh.addBox(center, halfsize, regions, enabled, tsf);
     }
 }
 

src/constants.hpp

@@ -6,7 +6,7 @@
 #include <string>
 
 inline constexpr int ENGINE_VERSION_MAJOR = 0;
-inline constexpr int ENGINE_VERSION_MINOR = 29;
+inline constexpr int ENGINE_VERSION_MINOR = 30;
 
 #ifdef NDEBUG
 inline constexpr bool ENGINE_DEBUG_BUILD = false;
@@ -14,7 +14,7 @@ inline constexpr bool ENGINE_DEBUG_BUILD = false;
 inline constexpr bool ENGINE_DEBUG_BUILD = true;
 #endif // NDEBUG
 
-inline const std::string ENGINE_VERSION_STRING = "0.29";
+inline const std::string ENGINE_VERSION_STRING = "0.30";
 
 /// @brief world regions format version
 inline constexpr uint REGION_FORMAT_VERSION = 3;

src/devtools/DebuggingServer.cpp

@@ -0,0 +1,315 @@
+#include "DebuggingServer.hpp"
+
+#include "engine/Engine.hpp"
+#include "network/Network.hpp"
+#include "debug/Logger.hpp"
+#include "coders/json.hpp"
+
+using namespace devtools;
+
+static debug::Logger logger("debug-server");
+
+ClientConnection::~ClientConnection() {
+    if (auto connection = dynamic_cast<network::ReadableConnection*>(
+        network.getConnection(this->connection, true)
+    )) {
+        connection->close();
+    }
+}
+
+bool ClientConnection::initiate(network::ReadableConnection* connection) {
+    if (connection->available() < 8) {
+        return false;
+    }
+    char buffer[8] {};
+    char expected[8] {};
+    std::memcpy(expected, VCDBG_MAGIC, sizeof(VCDBG_MAGIC));
+    expected[6] = VCDBG_VERSION >> 8;
+    expected[7] = VCDBG_VERSION & 0xFF;
+    connection->recv(buffer, sizeof(VCDBG_MAGIC));
+
+    connection->send(expected, sizeof(VCDBG_MAGIC));
+    if (std::memcmp(expected, buffer, sizeof(VCDBG_MAGIC)) == 0) {
+        initiated = true;
+        return false;
+    } else {
+        connection->close(true);
+        return true;
+    }
+}
+
+std::string ClientConnection::read() {
+    auto connection = dynamic_cast<network::ReadableConnection*>(
+        network.getConnection(this->connection, true)
+    );
+    if (connection == nullptr) {
+        return "";
+    }
+    if (!initiated) {
+        if (initiate(connection)) {
+            return "";
+        }
+    }
+    if (messageLength == 0) {
+        if (connection->available() >= sizeof(int32_t)) {
+            int32_t length = 0;
+            connection->recv(reinterpret_cast<char*>(&length), sizeof(int32_t));
+            if (length <= 0) {
+                logger.error() << "invalid message length " << length;
+            } else {
+                logger.info() << "message length " << length;
+                messageLength = length;
+            }
+        }
+    } else if (connection->available() >= messageLength) {
+        std::string string(messageLength, 0);
+        connection->recv(string.data(), messageLength);
+        messageLength = 0;
+        return string;
+    }
+    return "";
+}
+
+void ClientConnection::send(const dv::value& object) {
+    auto connection = dynamic_cast<network::ReadableConnection*>(
+        network.getConnection(this->connection, true)
+    );
+    if (connection == nullptr) {
+        return;
+    }
+    auto message = json::stringify(object, false);
+    int32_t length = message.length();
+    connection->send(reinterpret_cast<char*>(&length), sizeof(int32_t));
+    connection->send(message.data(), length);
+}
+
+void ClientConnection::sendResponse(const std::string& type) {
+    send(dv::object({{"type", type}}));
+}
+
+bool ClientConnection::alive() const {
+    return network.getConnection(this->connection, true) != nullptr;
+}
+
+static network::Server& create_tcp_server(
+    DebuggingServer& dbgServer, Engine& engine, int port
+) {
+    auto& network = engine.getNetwork();
+    u64id_t serverId = network.openTcpServer(
+        port,
+        [&network, &dbgServer](u64id_t sid, u64id_t id) {
+            auto& connection = dynamic_cast<network::ReadableConnection&>(
+                *network.getConnection(id, true)
+            );
+            connection.setPrivate(true);
+            logger.info() << "connected client " << id << ": "
+                          << connection.getAddress() << ":"
+                          << connection.getPort();
+            dbgServer.setClient(id);
+        }
+    );
+    auto& server = *network.getServer(serverId, true);
+    server.setPrivate(true);
+
+    auto& tcpServer = dynamic_cast<network::TcpServer&>(server);
+    tcpServer.setMaxClientsConnected(1);
+
+    logger.info() << "tcp debugging server open at port " << server.getPort();
+
+    return tcpServer;
+}
+
+static network::Server& create_server(
+    DebuggingServer& dbgServer, Engine& engine, const std::string& serverString
+) {
+    logger.info() << "starting debugging server";
+
+    size_t sepPos = serverString.find(':');
+    if (sepPos == std::string::npos) {
+        throw std::runtime_error("invalid debugging server configuration string");
+    }
+    auto transport = serverString.substr(0, sepPos);
+    if (transport == "tcp") {
+        int port;
+        try {
+            port = std::stoi(serverString.substr(sepPos + 1));
+        } catch (const std::exception& err) {
+            throw std::runtime_error("invalid tcp port");
+        }
+        return create_tcp_server(dbgServer, engine, port);
+    } else {
+        throw std::runtime_error(
+            "unsupported debugging server transport '" + transport + "'"
+        );
+    }
+}
+
+DebuggingServer::DebuggingServer(
+    Engine& engine, const std::string& serverString
+)
+    : engine(engine),
+      server(create_server(*this, engine, serverString)),
+      connection(nullptr) {
+}
+
+DebuggingServer::~DebuggingServer() {
+    logger.info() << "stopping debugging server";
+    server.close();
+}
+
+
+bool DebuggingServer::update() {
+    if (connection == nullptr) {
+        return false;
+    }
+    std::string message = connection->read();
+    if (message.empty()) {
+        if (!connection->alive()) {
+            bool status = performCommand(disconnectAction, dv::object());
+            connection.reset();
+            return status;
+        }
+        return false;
+    }
+    logger.debug() << "received: " << message;
+    try {
+        auto obj = json::parse(message);
+        if (!obj.has("type")) {
+            logger.error() << "missing message type";
+            return false;
+        }
+        const auto& type = obj["type"].asString();
+        if (performCommand(type, obj)) {
+            connection->sendResponse("resumed");
+            return true;
+        }
+    } catch (const std::runtime_error& err) {
+        logger.error() << "could not to parse message: " << err.what();
+    }
+    return false;
+}
+
+bool DebuggingServer::performCommand(
+    const std::string& type, const dv::value& map
+) {
+    if (!connectionEstablished && type == "connect") {
+        map.at("disconnect-action").get(disconnectAction);
+        connectionEstablished = true;
+        logger.info() << "client connection established";
+        connection->sendResponse("success");
+    }
+    if (!connectionEstablished) {
+        return false;
+    }
+    if (type == "terminate") {
+        engine.quit();
+        connection->sendResponse("success");
+    } else if (type == "detach") {
+        connection->sendResponse("success");
+        connection.reset();
+        engine.detachDebugger();
+        return false;
+    } else if (type == "set-breakpoint" || type == "remove-breakpoint") {
+        if (!map.has("source") || !map.has("line"))
+            return false;
+        breakpointEvents.push_back(DebuggingEvent {
+            type[0] == 's' 
+            ? DebuggingEventType::SET_BREAKPOINT
+            : DebuggingEventType::REMOVE_BREAKPOINT,
+            BreakpointEventDto {
+                map["source"].asString(),
+                static_cast<int>(map["line"].asInteger()),
+            }
+        });
+    } else if (type == "step" || type == "step-into-function") {
+        breakpointEvents.push_back(DebuggingEvent {
+            type == "step"
+            ? DebuggingEventType::STEP
+            : DebuggingEventType::STEP_INTO_FUNCTION,
+            SignalEventDto {}
+        });
+        return true;
+    } else if (type == "resume") {
+        breakpointEvents.push_back(DebuggingEvent {
+            DebuggingEventType::RESUME, SignalEventDto {}});
+        return true;
+    } else if (type == "get-value") {
+        if (!map.has("frame") || !map.has("local") || !map.has("path"))
+            return false;
+
+        int frame = map["frame"].asInteger();
+        int localIndex = map["local"].asInteger();
+
+        ValuePath path;
+        for (const auto& segment : map["path"]) {
+            if (segment.isString()) {
+                path.emplace_back(segment.asString());
+            } else {
+                path.emplace_back(static_cast<int>(segment.asInteger()));
+            }
+        }
+        breakpointEvents.push_back(DebuggingEvent {
+            DebuggingEventType::GET_VALUE, GetValueEventDto {
+                frame, localIndex, std::move(path)
+            }
+        });
+        return true;
+    } else {
+        logger.error() << "unsupported command '" << type << "'";
+    }
+    return false;
+}
+
+void DebuggingServer::pause(
+    std::string&& reason, std::string&& message, dv::value&& stackTrace
+) {
+    if (connection == nullptr) {
+        return;
+    }
+    auto response = dv::object({{"type", std::string("paused")}});
+    if (!reason.empty()) {
+        response["reason"] = std::move(reason);
+    }
+    if (!message.empty()) {
+        response["message"] = std::move(message);
+    }
+    if (stackTrace != nullptr) {
+        response["stack"] = std::move(stackTrace);
+    }
+    connection->send(std::move(response));
+    engine.startPauseLoop();
+}
+
+void DebuggingServer::sendValue(
+    dv::value&& value, int frame, int local, ValuePath&& path
+) {
+    auto pathValue = dv::list();
+    for (const auto& segment : path) {
+        if (auto string = std::get_if<std::string>(&segment)) {
+            pathValue.add(*string);
+        } else {
+            pathValue.add(std::get<int>(segment));
+        }
+    }
+    connection->send(dv::object({
+        {"type", std::string("value")},
+        {"frame", frame},
+        {"local", local},
+        {"path", std::move(pathValue)},
+        {"value", std::move(value)},
+    }));
+}
+
+void DebuggingServer::setClient(u64id_t client) {
+    connection =
+        std::make_unique<ClientConnection>(engine.getNetwork(), client);
+    connectionEstablished = false;
+}
+
+std::vector<DebuggingEvent> DebuggingServer::pullEvents() {
+    return std::move(breakpointEvents);
+}
+
+void DebuggingServer::setDisconnectAction(const std::string& action) {
+    disconnectAction = action;
+}

src/devtools/DebuggingServer.hpp

@@ -0,0 +1,106 @@
+#pragma once
+
+#include <memory>
+#include <string>
+#include <vector>
+#include <variant>
+
+#include "typedefs.hpp"
+
+namespace network {
+    class Server;
+    class Connection;
+    class ReadableConnection;
+    class Network;
+}
+
+namespace dv {
+    class value;
+}
+
+class Engine;
+
+namespace devtools {
+    inline constexpr const char VCDBG_MAGIC[8] = "vc-dbg\0";
+    inline constexpr int VCDBG_VERSION = 1;
+
+    class ClientConnection {
+    public:
+        ClientConnection(network::Network& network, u64id_t connection)
+            : network(network), connection(connection) {
+        }
+        ~ClientConnection();
+
+        std::string read();
+        void send(const dv::value& message);
+        void sendResponse(const std::string& type);
+
+        bool alive() const;
+    private:
+        network::Network& network;
+        size_t messageLength = 0;
+        u64id_t connection;
+        bool initiated = false;
+    
+        bool initiate(network::ReadableConnection* connection);
+    };
+
+    enum class DebuggingEventType {
+        SET_BREAKPOINT = 1,
+        REMOVE_BREAKPOINT,
+        STEP,
+        STEP_INTO_FUNCTION,
+        RESUME,
+        GET_VALUE,
+    };
+
+    struct BreakpointEventDto {
+        std::string source;
+        int line;
+    };
+
+    struct SignalEventDto {
+    };
+
+    using ValuePath = std::vector<std::variant<std::string, int>>;
+
+    struct GetValueEventDto {
+        int frame;
+        int localIndex;
+        ValuePath path;
+    };
+
+    struct DebuggingEvent {
+        DebuggingEventType type;
+        std::variant<BreakpointEventDto, SignalEventDto, GetValueEventDto> data;
+    };
+
+    class DebuggingServer {
+    public:
+        DebuggingServer(Engine& engine, const std::string& serverString);
+        ~DebuggingServer();
+
+        bool update();
+        void pause(
+            std::string&& reason, std::string&& message, dv::value&& stackTrace
+        );
+
+        void sendValue(dv::value&& value, int frame, int local, ValuePath&& path);
+
+        void setClient(u64id_t client);
+        std::vector<DebuggingEvent> pullEvents();
+
+        void setDisconnectAction(const std::string& action);
+    private:
+        Engine& engine;
+        network::Server& server;
+        std::unique_ptr<ClientConnection> connection;
+        bool connectionEstablished = false;
+        std::vector<DebuggingEvent> breakpointEvents;
+        std::string disconnectAction = "resume";
+
+        bool performCommand(
+            const std::string& type, const dv::value& map
+        );
+    };
+}

src/engine/Engine.cpp

@@ -14,6 +14,7 @@
 #include "coders/commons.hpp"
 #include "devtools/Editor.hpp"
 #include "devtools/Project.hpp"
+#include "devtools/DebuggingServer.hpp"
 #include "content/ContentControl.hpp"
 #include "core_defs.hpp"
 #include "io/io.hpp"
@@ -115,6 +116,9 @@ void Engine::initializeClient() {
     if (ENGINE_DEBUG_BUILD) {
         title += " [debug]";
     }
+    if (debuggingServer) {
+        title = "[debugging] " + title;
+    }
     auto [window, input] = Window::initialize(&settings.display, title);
     if (!window || !input){
         throw initialize_error("could not initialize window");
@@ -135,10 +139,11 @@ void Engine::initializeClient() {
     if (ENGINE_DEBUG_BUILD) {
         menus::create_version_label(*gui);
     }
-    keepAlive(settings.display.fullscreen.observe(
-        [this](bool value) {
-            if (value != this->window->isFullscreen()) {
-                this->window->toggleFullscreen();
+    keepAlive(settings.display.windowMode.observe(
+        [this](int value) {
+            WindowMode mode = static_cast<WindowMode>(value);
+            if (mode != this->window->getMode()) {
+                this->window->setMode(mode);
             }
         },
         true
@@ -172,6 +177,18 @@ void Engine::initialize(CoreParameters coreParameters) {
     cmd = std::make_unique<cmd::CommandsInterpreter>();
     network = network::Network::create(settings.network);
 
+    if (!params.debugServerString.empty()) {
+        try {
+            debuggingServer = std::make_unique<devtools::DebuggingServer>(
+                *this, params.debugServerString
+            );
+        } catch (const std::runtime_error& err) {
+            throw initialize_error(
+                "debugging server error: " + std::string(err.what())
+            );
+        }
+    }
+
     if (!params.scriptFile.empty()) {
         paths.setScriptFolder(params.scriptFile.parent_path());
     }
@@ -237,7 +254,11 @@ void Engine::updateHotkeys() {
         gui->toggleDebug();
     }
     if (input->jpressed(Keycode::F11)) {
-        settings.display.fullscreen.toggle();
+        if (settings.display.windowMode.get() != static_cast<int>(WindowMode::FULLSCREEN)) {
+            settings.display.windowMode.set(static_cast<int>(WindowMode::FULLSCREEN));
+        } else {
+            settings.display.windowMode.set(static_cast<int>(WindowMode::WINDOWED));
+        }
     }
 }
 
@@ -261,6 +282,14 @@ void Engine::postUpdate() {
     network->update();
     postRunnables.run();
     scripting::process_post_runnables();
+
+    if (debuggingServer) {
+        debuggingServer->update();
+    }
+}
+
+void Engine::detachDebugger() {
+    debuggingServer.reset();
 }
 
 void Engine::updateFrontend() {
@@ -282,6 +311,30 @@ void Engine::nextFrame() {
     input->pollEvents();
 }
 
+void Engine::startPauseLoop() {
+    bool initialCursorLocked = false;
+    if (!isHeadless()) {
+        initialCursorLocked = input->isCursorLocked();
+        if (initialCursorLocked) {
+            input->toggleCursor();
+        }
+    }
+    while (!isQuitSignal() && debuggingServer) {
+        network->update();
+        if (debuggingServer->update()) {
+            break;
+        }
+        if (isHeadless()) {
+            platform::sleep(1.0 / params.tps * 1000);
+        } else {
+            nextFrame();
+        }
+    }
+    if (initialCursorLocked) {
+        input->toggleCursor();
+    }
+}
+
 void Engine::renderFrame() {
     screen->draw(time.getDelta());
 
@@ -294,7 +347,11 @@ void Engine::saveSettings() {
     io::write_string(EnginePaths::SETTINGS_FILE, toml::stringify(*settingsHandler));
     if (!params.headless) {
         logger.info() << "saving bindings";
-        io::write_string(EnginePaths::CONTROLS_FILE, input->getBindings().write());
+        if (input) {
+            io::write_string(
+                EnginePaths::CONTROLS_FILE, input->getBindings().write()
+            );
+        }
     }
 }
 
@@ -313,6 +370,7 @@ void Engine::close() {
         logger.info() << "gui finished";
     }
     audio::close();
+    debuggingServer.reset();
     network.reset();
     clearKeepedObjects();
     project.reset();

src/engine/Engine.hpp

@@ -36,6 +36,7 @@ namespace network {
 
 namespace devtools {
     class Editor;
+    class DebuggingServer;
 }
 
 class initialize_error : public std::runtime_error {
@@ -50,6 +51,8 @@ struct CoreParameters {
     std::filesystem::path userFolder = ".";
     std::filesystem::path scriptFile;
     std::filesystem::path projectFolder;
+    std::string debugServerString;
+    int tps = 20;
 };
 
 using OnWorldOpen = std::function<void(std::unique_ptr<Level>, int64_t)>;
@@ -71,6 +74,7 @@ class Engine : public util::ObjectsKeeper {
     std::unique_ptr<Input> input;
     std::unique_ptr<gui::GUI> gui;
     std::unique_ptr<devtools::Editor> editor;
+    std::unique_ptr<devtools::DebuggingServer> debuggingServer;
     PostRunnables postRunnables;
     Time time;
     OnWorldOpen levelConsumer;
@@ -104,6 +108,7 @@ public:
     void updateFrontend();
     void renderFrame();
     void nextFrame();
+    void startPauseLoop();
     
     /// @brief Set screen (scene).
     /// nullptr may be used to delete previous screen before creating new one,
@@ -181,4 +186,10 @@ public:
     const Project& getProject() {
         return *project;
     }
+
+    devtools::DebuggingServer* getDebuggingServer() {
+        return debuggingServer.get();
+    }
+
+    void detachDebugger();
 };

src/engine/ServerMainloop.cpp

@@ -15,8 +15,6 @@ using namespace std::chrono;
 
 static debug::Logger logger("mainloop");
 
-inline constexpr int TPS = 20;
-
 ServerMainloop::ServerMainloop(Engine& engine) : engine(engine) {
 }
 
@@ -39,7 +37,7 @@ void ServerMainloop::run() {
         "script:" + coreParams.scriptFile.filename().u8string()
     );
 
-    double targetDelta = 1.0 / static_cast<double>(TPS);
+    double targetDelta = 1.0 / static_cast<double>(coreParams.tps);
     double delta = targetDelta;
     auto begin = system_clock::now();
     auto startupTime = begin;

src/graphics/commons/Model.cpp

@@ -8,21 +8,6 @@ inline constexpr glm::vec3 X(1, 0, 0);
 inline constexpr glm::vec3 Y(0, 1, 0);
 inline constexpr glm::vec3 Z(0, 0, 1);
 
-void Mesh::addPlane(
-    const glm::vec3& pos,
-    const glm::vec3& right,
-    const glm::vec3& up,
-    const glm::vec3& norm
-) {
-    vertices.push_back({pos-right-up, {0,0}, norm});
-    vertices.push_back({pos+right-up, {1,0}, norm});
-    vertices.push_back({pos+right+up, {1,1}, norm});
-
-    vertices.push_back({pos-right-up, {0,0}, norm});
-    vertices.push_back({pos+right+up, {1,1}, norm});
-    vertices.push_back({pos-right+up, {0,1}, norm});
-}
-
 void Mesh::addPlane(
     const glm::vec3& pos,
     const glm::vec3& right,
@@ -39,6 +24,23 @@ void Mesh::addPlane(
     vertices.push_back({pos-right+up, {uv.u1, uv.v2}, norm});
 }
 
+void Mesh::addPlane(
+    const glm::vec3& pos,
+    const glm::vec3& right,
+    const glm::vec3& up,
+    const glm::vec3& norm,
+    const UVRegion& region,
+    const glm::mat4& transform
+) {
+    addPlane(
+        glm::vec3(transform * glm::vec4(pos, 1.0f)),
+        glm::vec3(transform * glm::vec4(right, 0.0f)),
+        glm::vec3(transform * glm::vec4(up, 0.0f)),
+        glm::normalize(glm::vec3(transform * glm::vec4(norm, 0.0f))),
+        region
+    );
+}
+
 void Mesh::addRect(
     const glm::vec3& pos,
     const glm::vec3& right,
@@ -56,14 +58,15 @@ void Mesh::addRect(
 }
 
 void Mesh::addBox(const glm::vec3& pos, const glm::vec3& size) {
-    addPlane(pos+Z*size, X*size, Y*size, Z);
-    addPlane(pos-Z*size, -X*size, Y*size, -Z);
+    UVRegion fullRegion (0, 0, 1, 1);
+    addPlane(pos+Z*size, X*size, Y*size, Z, fullRegion);
+    addPlane(pos-Z*size, -X*size, Y*size, -Z, fullRegion);
 
-    addPlane(pos+Y*size, X*size, -Z*size, Y);
-    addPlane(pos-Y*size, X*size, Z*size, -Y);
+    addPlane(pos+Y*size, X*size, -Z*size, Y, fullRegion);
+    addPlane(pos-Y*size, X*size, Z*size, -Y, fullRegion);
 
-    addPlane(pos+X*size, -Z*size, Y*size, X);
-    addPlane(pos-X*size, Z*size, Y*size, -X);
+    addPlane(pos+X*size, -Z*size, Y*size, X, fullRegion);
+    addPlane(pos-X*size, Z*size, Y*size, -X, fullRegion);
 }
 
 void Mesh::addBox(
@@ -71,19 +74,29 @@ void Mesh::addBox(
     const glm::vec3& size,
     const UVRegion (&uvs)[6],
     const bool enabledSides[6]
+) {
+    addBox(pos, size, uvs, enabledSides, glm::mat4(1.0f));
+}
+
+void Mesh::addBox(
+    const glm::vec3& pos,
+    const glm::vec3& size,
+    const UVRegion (&uvs)[6],
+    const bool enabledSides[6],
+    const glm::mat4& transform
 ) {
     if (enabledSides[0]) // north
-        addPlane(pos+Z*size, X*size, Y*size, Z, uvs[0]);
+        addPlane(pos+Z*size, X*size, Y*size, Z, uvs[0], transform);
     if (enabledSides[1]) // south
-        addPlane(pos-Z*size, -X*size, Y*size, -Z, uvs[1]);
+        addPlane(pos-Z*size, -X*size, Y*size, -Z, uvs[1], transform);
     if (enabledSides[2]) // top
-        addPlane(pos+Y*size, X*size, -Z*size, Y, uvs[2] * glm::vec2(-1));
+        addPlane(pos+Y*size, X*size, -Z*size, Y, uvs[2] * glm::vec2(-1), transform);
     if (enabledSides[3]) // bottom
-        addPlane(pos-Y*size, X*size, Z*size, -Y, uvs[3] * glm::vec2(-1, 1));
+        addPlane(pos-Y*size, X*size, Z*size, -Y, uvs[3] * glm::vec2(-1, 1), transform);
     if (enabledSides[4]) // west
-        addPlane(pos+X*size, -Z*size, Y*size, X, uvs[4]);
+        addPlane(pos+X*size, -Z*size, Y*size, X, uvs[4], transform);
     if (enabledSides[5]) // east
-        addPlane(pos-X*size, Z*size, Y*size, -X, uvs[5] * glm::vec2(-1, 1));
+        addPlane(pos-X*size, Z*size, Y*size, -X, uvs[5] * glm::vec2(-1, 1), transform);
 }
 
 void Mesh::scale(const glm::vec3& size) {

src/graphics/commons/Model.hpp

@@ -22,14 +22,16 @@ namespace model {
             const glm::vec3& pos,
             const glm::vec3& right,
             const glm::vec3& up,
-            const glm::vec3& norm
+            const glm::vec3& norm,
+            const UVRegion& region
         );
         void addPlane(
             const glm::vec3& pos,
             const glm::vec3& right,
             const glm::vec3& up,
             const glm::vec3& norm,
-            const UVRegion& region
+            const UVRegion& region,
+            const glm::mat4& transform
         );
         void addRect(
             const glm::vec3& pos,
@@ -45,6 +47,13 @@ namespace model {
             const UVRegion (&texfaces)[6],
             const bool enabledSides[6]
         );
+        void addBox(
+            const glm::vec3& pos,
+            const glm::vec3& size,
+            const UVRegion (&texfaces)[6],
+            const bool enabledSides[6],
+            const glm::mat4& transform
+        );
         void scale(const glm::vec3& size);
     };
 

src/graphics/core/Cubemap.cpp

@@ -25,7 +25,7 @@ Cubemap::Cubemap(uint width, uint height, ImageFormat imageFormat)
             0, 
             format, 
             GL_UNSIGNED_BYTE, 
-            NULL
+            nullptr
         );
     }
 }

src/graphics/core/Shadows.cpp

@@ -1,8 +1,11 @@
+#define GLM_ENABLE_EXPERIMENTAL
+#include <glm/gtx/norm.hpp>
+#include <glm/gtc/constants.hpp>
+#include <glm/gtc/matrix_transform.hpp>
+
 #include "Shadows.hpp"
 
 #include <GL/glew.h>
-#define GLM_ENABLE_EXPERIMENTAL
-#include <glm/gtx/norm.hpp>
 
 #include "assets/Assets.hpp"
 #include "graphics/core/DrawContext.hpp"
@@ -23,7 +26,7 @@ public:
         glGenTextures(1, &depthMap);
         glBindTexture(GL_TEXTURE_2D, depthMap);
         glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT,
-            resolution, resolution, 0, GL_DEPTH_COMPONENT, GL_FLOAT, NULL);
+            resolution, resolution, 0, GL_DEPTH_COMPONENT, GL_FLOAT, nullptr);
         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);

src/graphics/render/Emitter.cpp

@@ -1,6 +1,8 @@
 #include "Emitter.hpp"
 
 #include <glm/gtc/random.hpp>
+#include <glm/gtc/constants.hpp>
+#include <glm/gtc/matrix_transform.hpp>
 #define GLM_ENABLE_EXPERIMENTAL
 #include <glm/gtx/norm.hpp>
 

src/graphics/ui/gui_util.cpp

@@ -103,9 +103,14 @@ void guiutil::confirm(
 
     panel->setGravity(Gravity::center_center);
     container->add(panel);
-
     panel->setColor(glm::vec4(0.0f, 0.0f, 0.0f, 0.5f));
-    panel->add(std::make_shared<Label>(gui, text));
+
+    auto label = std::make_shared<Label>(gui, text);
+    label->setSize(glm::vec2(600, 50));
+    label->setMultiline(true);
+    label->setTextWrapping(true);
+
+    panel->add(label);
     auto subpanel = std::make_shared<Panel>(gui, glm::vec2(600, 53));
     subpanel->setColor(glm::vec4(0));
 

src/graphics/ui/gui_util.hpp

@@ -17,7 +17,7 @@ namespace guiutil {
     /// @brief Create element from XML
     /// @param source XML
     std::shared_ptr<gui::UINode> create(
-        gui::GUI& gui, const std::string& source, scriptenv env = 0
+        gui::GUI& gui, const std::string& source, scriptenv env = nullptr
     );
 
     void alert(

src/io/engine_paths.cpp

@@ -6,6 +6,7 @@
 #include <stack>
 #include "typedefs.hpp"
 #include "util/stringutil.hpp"
+#include "util/platform.hpp"
 #include <utility>
 
 #include "io/devices/StdfsDevice.hpp"
@@ -44,6 +45,7 @@ void EnginePaths::prepare() {
             resourcesFolder.string() + " is not a directory"
         );
     }
+    logger.info() << "executable path: " << platform::get_executable_path().string();
     logger.info() << "resources folder: " << fs::canonical(resourcesFolder).u8string();
     logger.info() << "user files folder: " << fs::canonical(userFilesFolder).u8string();
     logger.info() << "project folder: " << fs::canonical(projectFolder).u8string();

src/io/settings_io.cpp

@@ -49,8 +49,8 @@ SettingsHandler::SettingsHandler(EngineSettings& settings) {
     builder.add("height", &settings.display.height);
     builder.add("samples", &settings.display.samples);
     builder.add("framerate", &settings.display.framerate);
-    builder.add("fullscreen", &settings.display.fullscreen);
     builder.add("limit-fps-iconified", &settings.display.limitFpsIconified);
+    builder.add("window-mode", &settings.display.windowMode);
 
     builder.section("camera");
     builder.add("sensitivity", &settings.camera.sensitivity);

src/logic/PlayerController.cpp

@@ -488,7 +488,10 @@ void PlayerController::updateInteraction(const Input& inputEvents, float delta)
     }
     const auto& bindings = inputEvents.getBindings();
     bool xkey = bindings.active(BIND_PLAYER_FAST_INTERACTOIN);
-    float maxDistance = xkey ? 200.0f : 10.0f;
+    float maxDistance = player.getMaxInteractionDistance();
+    if (xkey) {
+        maxDistance *= 100.0;
+    }
     bool longInteraction = interactionTimer <= 0 || xkey;
     bool lclick = bindings.jactive(BIND_PLAYER_DESTROY) ||
                   (longInteraction && bindings.active(BIND_PLAYER_DESTROY));

src/logic/scripting/lua/libs/api_lua.hpp

@@ -43,6 +43,7 @@ extern const luaL_Reg playerlib[];
 extern const luaL_Reg posteffectslib[]; // gfx.posteffects
 extern const luaL_Reg quatlib[];
 extern const luaL_Reg randomlib[];
+extern const luaL_Reg compressionlib[];
 extern const luaL_Reg text3dlib[]; // gfx.text3d
 extern const luaL_Reg timelib[];
 extern const luaL_Reg tomllib[];

src/logic/scripting/lua/libs/lib__rigidbody.cpp

@@ -169,4 +169,5 @@ const luaL_Reg rigidbodylib[] = {
     {"set_crouching", lua::wrap<l_set_crouching>},
     {"get_body_type", lua::wrap<l_get_body_type>},
     {"set_body_type", lua::wrap<l_set_body_type>},
-    {NULL, NULL}};
+    {nullptr, nullptr}
+};

src/logic/scripting/lua/libs/lib__skeleton.cpp

@@ -169,5 +169,5 @@ const luaL_Reg skeletonlib[] = {
     {"is_interpolated", lua::wrap<l_is_interpolated>},
     {"set_interpolated", lua::wrap<l_set_interpolated>},
     {"exists", lua::wrap<l_exists>},
-    {NULL, NULL}
+    {nullptr, nullptr}
 };

src/logic/scripting/lua/libs/lib__transform.cpp

@@ -51,4 +51,5 @@ const luaL_Reg transformlib[] = {
     {"set_size", lua::wrap<l_set_size>},
     {"get_rot", lua::wrap<l_get_rot>},
     {"set_rot", lua::wrap<l_set_rot>},
-    {NULL, NULL}};
+    {nullptr, nullptr}
+};

src/logic/scripting/lua/libs/libapp.cpp

@@ -2,5 +2,5 @@
 
 const luaL_Reg applib[] = {
     // see libcore.cpp an stdlib.lua
-    {NULL, NULL}
+    {nullptr, nullptr}
 };

src/logic/scripting/lua/libs/libassets.cpp

@@ -67,5 +67,5 @@ static int l_parse_model(lua::State* L) {
 const luaL_Reg assetslib[] = {
     {"load_texture", lua::wrap<l_load_texture>},
     {"parse_model", lua::wrap<l_parse_model>},
-    {NULL, NULL}
+    {nullptr, nullptr}
 };

src/logic/scripting/lua/libs/libaudio.cpp

@@ -394,4 +394,5 @@ const luaL_Reg audiolib[] = {
     {"get_velocity", lua::wrap<l_audio_get_velocity>},
     {"count_speakers", lua::wrap<l_audio_count_speakers>},
     {"count_streams", lua::wrap<l_audio_count_streams>},
-    {NULL, NULL}};
+    {nullptr, nullptr}
+};

src/logic/scripting/lua/libs/libbase64.cpp

@@ -49,5 +49,5 @@ const luaL_Reg base64lib[] = {
     {"decode", lua::wrap<l_decode<util::base64_decode>>},
     {"encode_urlsafe", lua::wrap<l_encode<util::base64_urlsafe_encode>>},
     {"decode_urlsafe", lua::wrap<l_decode<util::base64_urlsafe_decode>>},
-    {NULL, NULL}
+    {nullptr, nullptr}
 };

src/logic/scripting/lua/libs/libbjson.cpp

@@ -35,5 +35,5 @@ static int l_frombytes(lua::State* L) {
 const luaL_Reg bjsonlib[] = {
     {"tobytes", lua::wrap<l_tobytes>},
     {"frombytes", lua::wrap<l_frombytes>},
-    {NULL, NULL}
+    {nullptr, nullptr}
 };

src/logic/scripting/lua/libs/libblock.cpp

@@ -783,5 +783,5 @@ const luaL_Reg blocklib[] = {
     {"has_tag", lua::wrap<l_has_tag>},
     {"__get_tags", lua::wrap<l_get_tags>},
     {"__pull_register_events", lua::wrap<l_pull_register_events>},
-    {NULL, NULL}
+    {nullptr, nullptr}
 };

src/logic/scripting/lua/libs/libblockwraps.cpp

@@ -39,5 +39,5 @@ const luaL_Reg blockwrapslib[] = {
     {"unwrap", lua::wrap<l_unwrap>},
     {"set_pos", lua::wrap<l_set_pos>},
     {"set_texture", lua::wrap<l_set_texture>},
-    {NULL, NULL}
+    {nullptr, nullptr}
 };

src/logic/scripting/lua/libs/libbyteutil.cpp

@@ -208,5 +208,5 @@ const luaL_Reg byteutillib[] = {
     {"tpack", lua::wrap<l_tpack>},
     {"unpack", lua::wrap<l_unpack>},
     {"get_size", lua::wrap<l_get_size>},
-    {NULL, NULL}
+    {nullptr, nullptr}
 };

src/logic/scripting/lua/libs/libcamera.cpp

@@ -125,4 +125,5 @@ const luaL_Reg cameralib[] = {
     {"get_right", lua::wrap<l_camera_getter<getter_right>>},
     {"get_up", lua::wrap<l_camera_getter<getter_up>>},
     {"look_at", lua::wrap<l_look_at>},
-    {NULL, NULL}};
+    {nullptr, nullptr}
+};

src/logic/scripting/lua/libs/libcompression.cpp

@@ -0,0 +1,84 @@
+#include "api_lua.hpp"
+#include "coders/gzip.hpp"
+#include "../lua_engine.hpp"
+
+static int l_encode(lua::State* L) {
+    char argc = lua::gettop(L);
+    std::vector<unsigned char> compressedBytes;
+
+    std::string algo = "gzip";
+    if (argc >= 2) {
+        if (!lua::isstring(L, 2)) {
+            throw std::runtime_error("compression algorithm must be a string");
+        }
+        algo = lua::require_lstring(L, 2);
+    }
+
+    if (algo == "gzip") {
+        auto str = lua::bytearray_as_string(L, 1);
+        compressedBytes = gzip::compress(
+            reinterpret_cast<const ubyte*>(str.data()),
+            str.size()
+        );
+    } else {
+        throw std::runtime_error("unsupported compression algorithm");
+    }
+
+    if (argc < 3 || !lua::toboolean(L, 3)) {
+        lua::create_bytearray(L, std::move(compressedBytes));
+    } else {
+        size_t length = compressedBytes.size();
+        lua::createtable(L, length, 0);
+        int newTable = lua::gettop(L);
+        for (size_t i = 0; i < length; i++) {
+            lua::pushinteger(L, compressedBytes.data()[i]);
+            lua::rawseti(L, i + 1, newTable);
+        }
+    }
+
+    return 1;
+}
+
+static int l_decode(lua::State* L) {
+    char argc = lua::gettop(L);
+    std::vector<unsigned char> decompressedBytes;
+
+    std::string algo = "gzip";
+    if (argc >= 2) {
+        if (!lua::isstring(L, 2)) {
+            throw std::runtime_error("compression algorithm must be a string");
+        }
+        algo = lua::require_lstring(L, 2);
+    }
+
+    if (algo == "gzip") {
+        auto str = lua::bytearray_as_string(L, 1);
+        decompressedBytes = gzip::decompress(
+            reinterpret_cast<const ubyte*>(str.data()),
+            str.size()
+        );
+    } else {
+        throw std::runtime_error("unsupported compression algorithm");
+    }
+
+    if (argc < 3 || !lua::toboolean(L, 3)) {
+        lua::create_bytearray(L, std::move(decompressedBytes));
+    } else {
+        size_t length = decompressedBytes.size();
+        lua::createtable(L, length, 0);
+        int newTable = lua::gettop(L);
+        for (size_t i = 0; i < length; i++) {
+            lua::pushinteger(L, decompressedBytes.data()[i]);
+            lua::rawseti(L, i + 1, newTable);
+        }
+    }
+
+    return 1;
+}
+
+const luaL_Reg compressionlib[] = {
+    {"encode", lua::wrap<l_encode>},
+    {"decode", lua::wrap<l_decode>},
+    {nullptr, nullptr}
+};
+

src/logic/scripting/lua/libs/libconsole.cpp

@@ -126,4 +126,5 @@ const luaL_Reg consolelib[] = {
     {"set", lua::wrap<l_set>},
     {"get_commands_list", lua::wrap<l_get_commands_list>},
     {"get_command_info", lua::wrap<l_get_command_info>},
-    {NULL, NULL}};
+    {nullptr, nullptr}
+};

src/logic/scripting/lua/libs/libcore.cpp

@@ -20,6 +20,11 @@
 #include "util/platform.hpp"
 #include "world/Level.hpp"
 #include "world/generator/WorldGenerator.hpp"
+#include "util/platform.hpp"
+#include "frontend/locale.hpp"
+#include "graphics/ui/gui_util.hpp"
+#include "graphics/ui/GUI.hpp"
+#include "graphics/ui/elements/Menu.hpp"
 
 using namespace scripting;
 
@@ -229,6 +234,24 @@ static int l_open_folder(lua::State* L) {
     return 0;
 }
 
+static int l_open_url(lua::State* L) {
+    auto url = lua::require_string(L, 1);
+
+    std::wstring msg = langs::get(L"Are you sure you want to open the link:") +
+                       L"\n" + util::str2wstr_utf8(url) +
+                       std::wstring(L"?");
+
+    auto menu = engine->getGUI().getMenu();
+
+    guiutil::confirm(*engine, msg, [url, menu]() {
+        platform::open_url(url);
+        if (!menu->back()) {
+            menu->reset();
+        }
+    });
+    return 0;
+}
+
 /// @brief Quit the game
 static int l_quit(lua::State*) {
     engine->quit();
@@ -284,7 +307,8 @@ const luaL_Reg corelib[] = {
     {"str_setting", lua::wrap<l_str_setting>},
     {"get_setting_info", lua::wrap<l_get_setting_info>},
     {"open_folder", lua::wrap<l_open_folder>},
+    {"open_url", lua::wrap<l_open_url>},
     {"quit", lua::wrap<l_quit>},
     {"capture_output", lua::wrap<l_capture_output>},
-    {NULL, NULL}
+    {nullptr, nullptr}
 };

src/logic/scripting/lua/libs/libentity.cpp

@@ -255,5 +255,5 @@ const luaL_Reg entitylib[] = {
     {"get_all_in_radius", lua::wrap<l_get_all_in_radius>},
     {"raycast", lua::wrap<l_raycast>},
     {"reload_component", lua::wrap<l_reload_component>},
-    {NULL, NULL}
+    {nullptr, nullptr}
 };

src/logic/scripting/lua/libs/libfile.cpp

@@ -188,34 +188,6 @@ static int l_list(lua::State* L) {
     return 1;
 }
 
-static int l_gzip_compress(lua::State* L) {
-    std::vector<ubyte> bytes;
-
-    lua::read_bytes_from_table(L, 1, bytes);
-    auto compressed_bytes = gzip::compress(bytes.data(), bytes.size());
-    int newTable = lua::gettop(L);
-
-    for (size_t i = 0; i < compressed_bytes.size(); i++) {
-        lua::pushinteger(L, compressed_bytes.data()[i]);
-        lua::rawseti(L, i + 1, newTable);
-    }
-    return 1;
-}
-
-static int l_gzip_decompress(lua::State* L) {
-    std::vector<ubyte> bytes;
-
-    lua::read_bytes_from_table(L, 1, bytes);
-    auto decompressed_bytes = gzip::decompress(bytes.data(), bytes.size());
-    int newTable = lua::gettop(L);
-
-    for (size_t i = 0; i < decompressed_bytes.size(); i++) {
-        lua::pushinteger(L, decompressed_bytes.data()[i]);
-        lua::rawseti(L, i + 1, newTable);
-    }
-    return 1;
-}
-
 static int l_read_combined_list(lua::State* L) {
     std::string path = lua::require_string(L, 1);
     if (path.find(':') != std::string::npos) {
@@ -419,8 +391,6 @@ const luaL_Reg filelib[] = {
     {"resolve", lua::wrap<l_resolve>},
     {"write_bytes", lua::wrap<l_write_bytes>},
     {"write", lua::wrap<l_write>},
-    {"gzip_compress", lua::wrap<l_gzip_compress>},
-    {"gzip_decompress", lua::wrap<l_gzip_decompress>},
     {"read_combined_list", lua::wrap<l_read_combined_list>},
     {"read_combined_object", lua::wrap<l_read_combined_object>},
     {"is_writeable", lua::wrap<l_is_writeable>},
@@ -434,5 +404,6 @@ const luaL_Reg filelib[] = {
     {"__flush_descriptor", lua::wrap<l_flush_descriptor>},
     {"__close_descriptor", lua::wrap<l_close_descriptor>},
     {"__close_all_descriptors", lua::wrap<l_close_all_descriptors>},
-    {NULL, NULL}
+    {nullptr, nullptr}
 };
+

src/logic/scripting/lua/libs/libgeneration.cpp

@@ -104,5 +104,5 @@ const luaL_Reg generationlib[] = {
     {"load_fragment", lua::wrap<l_load_fragment>},
     {"get_generators", lua::wrap<l_get_generators>},
     {"get_default_generator", lua::wrap<l_get_default_generator>},
-    {NULL, NULL}
+    {nullptr, nullptr}
 };

src/logic/scripting/lua/libs/libgui.cpp

@@ -1053,5 +1053,5 @@ const luaL_Reg guilib[] = {
     {"alert", lua::wrap<l_gui_alert>},
     {"load_document", lua::wrap<l_gui_load_document>},
     {"__reindex", lua::wrap<l_gui_reindex>},
-    {NULL, NULL}
+    {nullptr, nullptr}
 };

src/logic/scripting/lua/libs/libhud.cpp

@@ -208,5 +208,5 @@ const luaL_Reg hudlib[] = {
     {"_set_debug_cheats", wrap_hud<l_set_debug_cheats>},
     {"set_allow_pause", wrap_hud<l_set_allow_pause>},
     {"reload_script", wrap_hud<l_reload_script>},
-    {NULL, NULL}
+    {nullptr, nullptr}
 };

src/logic/scripting/lua/libs/libinput.cpp

@@ -177,5 +177,5 @@ const luaL_Reg inputlib[] = {
     {"is_pressed", lua::wrap<l_is_pressed>},
     {"reset_bindings", lua::wrap<l_reset_bindings>},
     {"set_enabled", lua::wrap<l_set_enabled>},
-    {NULL, NULL}
+    {nullptr, nullptr}
 };

src/logic/scripting/lua/libs/libinventory.cpp

@@ -256,5 +256,5 @@ const luaL_Reg inventorylib[] = {
     {"create", lua::wrap<l_create>},
     {"remove", lua::wrap<l_remove>},
     {"clone", lua::wrap<l_clone>},
-    {NULL, NULL}
+    {nullptr, nullptr}
 };

src/logic/scripting/lua/libs/libitem.cpp

@@ -147,5 +147,5 @@ const luaL_Reg itemlib[] = {
     {"reload_script", lua::wrap<l_reload_script>},
     {"has_tag", lua::wrap<l_has_tag>},
     {"__get_tags", lua::wrap<l_get_tags>},
-    {NULL, NULL}
+    {nullptr, nullptr}
 };

src/logic/scripting/lua/libs/libjson.cpp

@@ -19,5 +19,5 @@ static int l_json_parse(lua::State* L) {
 const luaL_Reg jsonlib[] = {
     {"tostring", lua::wrap<l_json_stringify>},
     {"parse", lua::wrap<l_json_parse>},
-    {NULL, NULL}
+    {nullptr, nullptr}
 };

src/logic/scripting/lua/libs/libmat4.cpp

@@ -282,4 +282,5 @@ const luaL_Reg mat4lib[] = {
     {"look_at", lua::wrap<l_look_at>},
     {"from_quat", lua::wrap<l_from_quat>},
     {"tostring", lua::wrap<l_tostring>},
-    {NULL, NULL}};
+    {nullptr, nullptr}
+};

src/logic/scripting/lua/libs/libnetwork.cpp

@@ -155,7 +155,7 @@ static int l_post(lua::State* L, network::Network& network) {
 
 static int l_close(lua::State* L, network::Network& network) {
     u64id_t id = lua::tointeger(L, 1);
-    if (auto connection = network.getConnection(id)) {
+    if (auto connection = network.getConnection(id, false)) {
         connection->close(true);
     }
     return 0;
@@ -163,7 +163,7 @@ static int l_close(lua::State* L, network::Network& network) {
 
 static int l_closeserver(lua::State* L, network::Network& network) {
     u64id_t id = lua::tointeger(L, 1);
-    if (auto server = network.getServer(id)) {
+    if (auto server = network.getServer(id, false)) {
         server->close();
     }
     return 0;
@@ -171,7 +171,7 @@ static int l_closeserver(lua::State* L, network::Network& network) {
 
 static int l_send(lua::State* L, network::Network& network) {
     u64id_t id = lua::tointeger(L, 1);
-    auto connection = network.getConnection(id);
+    auto connection = network.getConnection(id, false);
     if (connection == nullptr ||
         connection->getState() == network::ConnectionState::CLOSED) {
         return 0;
@@ -201,7 +201,7 @@ static int l_send(lua::State* L, network::Network& network) {
 static int l_udp_server_send_to(lua::State* L, network::Network& network) {
     u64id_t id = lua::tointeger(L, 1);
 
-    if (auto server = network.getServer(id)) {
+    if (auto server = network.getServer(id, false)) {
         if (server->getTransportType() != network::TransportType::UDP)
             throw std::runtime_error("the server must work on UDP transport");
 
@@ -238,7 +238,7 @@ static int l_recv(lua::State* L, network::Network& network) {
     u64id_t id = lua::tointeger(L, 1);
     int length = lua::tointeger(L, 2);
 
-    auto connection = engine->getNetwork().getConnection(id);
+    auto connection = engine->getNetwork().getConnection(id, false);
 
     if (connection == nullptr || connection->getTransportType() != network::TransportType::TCP) {
         return 0;
@@ -268,7 +268,7 @@ static int l_recv(lua::State* L, network::Network& network) {
 static int l_available(lua::State* L, network::Network& network) {
     u64id_t id = lua::tointeger(L, 1);
 
-    if (auto connection = network.getConnection(id)) {
+    if (auto connection = network.getConnection(id, false)) {
         return lua::pushinteger(L, dynamic_cast<network::TcpConnection*>(connection)->available());
     }
 
@@ -345,7 +345,7 @@ static int l_open_udp(lua::State* L, network::Network& network) {
 
 static int l_is_alive(lua::State* L, network::Network& network) {
     u64id_t id = lua::tointeger(L, 1);
-    if (auto connection = network.getConnection(id)) {
+    if (auto connection = network.getConnection(id, false)) {
         return lua::pushboolean(
             L,
             connection->getState() != network::ConnectionState::CLOSED ||
@@ -360,7 +360,7 @@ static int l_is_alive(lua::State* L, network::Network& network) {
 
 static int l_is_connected(lua::State* L, network::Network& network) {
     u64id_t id = lua::tointeger(L, 1);
-    if (auto connection = network.getConnection(id)) {
+    if (auto connection = network.getConnection(id, false)) {
         return lua::pushboolean(
             L, connection->getState() == network::ConnectionState::CONNECTED
         );
@@ -370,7 +370,7 @@ static int l_is_connected(lua::State* L, network::Network& network) {
 
 static int l_get_address(lua::State* L, network::Network& network) {
     u64id_t id = lua::tointeger(L, 1);
-    if (auto connection = network.getConnection(id)) {
+    if (auto connection = network.getConnection(id, false)) {
         lua::pushstring(L, connection->getAddress());
         lua::pushinteger(L, connection->getPort());
         return 2;
@@ -380,7 +380,7 @@ static int l_get_address(lua::State* L, network::Network& network) {
 
 static int l_is_serveropen(lua::State* L, network::Network& network) {
     u64id_t id = lua::tointeger(L, 1);
-    if (auto server = network.getServer(id)) {
+    if (auto server = network.getServer(id, false)) {
         return lua::pushboolean(L, server->isOpen());
     }
     return lua::pushboolean(L, false);
@@ -388,7 +388,7 @@ static int l_is_serveropen(lua::State* L, network::Network& network) {
 
 static int l_get_serverport(lua::State* L, network::Network& network) {
     u64id_t id = lua::tointeger(L, 1);
-    if (auto server = network.getServer(id)) {
+    if (auto server = network.getServer(id, false)) {
         return lua::pushinteger(L, server->getPort());
     }
     return 0;
@@ -402,6 +402,28 @@ static int l_get_total_download(lua::State* L, network::Network& network) {
     return lua::pushinteger(L, network.getTotalDownload());
 }
 
+static int l_set_nodelay(lua::State* L, network::Network& network) {
+    u64id_t id = lua::tointeger(L, 1);
+    bool noDelay = lua::toboolean(L, 2);
+    if (auto connection = network.getConnection(id, false)) {
+        if (connection->getTransportType() == network::TransportType::TCP) {
+            dynamic_cast<network::TcpConnection*>(connection)->setNoDelay(noDelay);
+        }
+    }
+    return 0;
+}
+
+static int l_is_nodelay(lua::State* L, network::Network& network) {
+    u64id_t id = lua::tointeger(L, 1);
+    if (auto connection = network.getConnection(id, false)) {
+        if (connection->getTransportType() == network::TransportType::TCP) {
+            bool noDelay = dynamic_cast<network::TcpConnection*>(connection)->isNoDelay();
+            return lua::pushboolean(L, noDelay);
+        }
+    }
+    return lua::pushboolean(L, false);
+}
+
 static int l_pull_events(lua::State* L, network::Network& network) {
     std::vector<NetworkEvent> local_queue;
     {
@@ -517,5 +539,7 @@ const luaL_Reg networklib[] = {
     {"__get_address", wrap<l_get_address>},
     {"__is_serveropen", wrap<l_is_serveropen>},
     {"__get_serverport", wrap<l_get_serverport>},
-    {NULL, NULL}
+    {"__set_nodelay", wrap<l_set_nodelay>},
+    {"__is_nodelay", wrap<l_is_nodelay>},
+    {nullptr, nullptr}
 };

src/logic/scripting/lua/libs/libpack.cpp

@@ -268,5 +268,5 @@ const luaL_Reg packlib[] = {
     {"get_base_packs", lua::wrap<l_pack_get_base_packs>},
     {"assemble", lua::wrap<l_pack_assemble>},
     {"request_writeable", lua::wrap<l_pack_request_writeable>},
-    {NULL, NULL}
+    {nullptr, nullptr}
 };

src/logic/scripting/lua/libs/libparticles.cpp

@@ -82,5 +82,5 @@ const luaL_Reg particleslib[] = {
     {"is_alive", wrap_hud<l_is_alive>},
     {"get_origin", wrap_hud<l_get_origin>},
     {"set_origin", wrap_hud<l_set_origin>},
-    {NULL, NULL}
+    {nullptr, nullptr}
 };

src/logic/scripting/lua/libs/libpathfinding.cpp

@@ -126,5 +126,5 @@ const luaL_Reg pathfindinglib[] = {
     {"set_max_visited", lua::wrap<l_set_max_visited_blocks>},
     {"set_jump_height", lua::wrap<l_set_jump_height>},
     {"avoid_tag", lua::wrap<l_avoid_tag>},
-    {NULL, NULL}
+    {nullptr, nullptr}
 };

src/logic/scripting/lua/libs/libplayer.cpp

@@ -2,14 +2,14 @@
 #include <glm/glm.hpp>
 
 #include "items/Inventory.hpp"
+#include "libentity.hpp"
 #include "objects/Entities.hpp"
+#include "objects/Entity.hpp"
 #include "objects/Player.hpp"
 #include "objects/Players.hpp"
-#include "objects/Entity.hpp"
 #include "physics/Hitbox.hpp"
 #include "window/Camera.hpp"
 #include "world/Level.hpp"
-#include "libentity.hpp"
 
 using namespace scripting;
 
@@ -53,7 +53,7 @@ static int l_set_vel(lua::State* L) {
     auto x = lua::tonumber(L, 2);
     auto y = lua::tonumber(L, 3);
     auto z = lua::tonumber(L, 4);
-    
+
     if (auto hitbox = player->getHitbox()) {
         hitbox->velocity = glm::vec3(x, y, z);
     }
@@ -181,6 +181,21 @@ static int l_set_loading_chunks(lua::State* L) {
     return 0;
 }
 
+static int l_get_interaction_distance(lua::State* L) {
+    if (auto player = get_player(L, 1)) {
+        return lua::pushnumber(L, player->getMaxInteractionDistance());
+    }
+    return 0;
+}
+
+static int l_set_interaction_distance(lua::State* L) {
+    if (auto player = get_player(L, 1)) {
+        player->setMaxInteractionDistance(
+            static_cast<float>(lua::tonumber(L, 2)));
+    }
+    return 0;
+}
+
 static int l_get_selected_block(lua::State* L) {
     if (auto player = get_player(L, 1)) {
         if (player->selection.vox.id == BLOCK_VOID) {
@@ -307,6 +322,38 @@ static int l_set_suspended(lua::State* L) {
     return 0;
 }
 
+static int l_get_all_in_radius(lua::State* L) {
+    auto center = lua::tovec3(L, 1);
+    auto radius = static_cast<float>(lua::tonumber(L, 2));
+
+    auto players = level->players->getAllInRadius(center, radius);
+    lua::createtable(L, players.size(), 0);
+    for (size_t i = 0; i < players.size(); i++) {
+        lua::pushinteger(L, players[i]->getId());
+        lua::rawseti(L, i + 1);
+    }
+    return 1;
+}
+
+static int l_get_all(lua::State* L) {
+    auto players = level->players->getAll();
+    lua::createtable(L, players.size(), 0);
+    for (size_t i = 0; i < players.size(); i++) {
+        lua::pushinteger(L, players[i]->getId());
+        lua::rawseti(L, i + 1);
+    }
+    return 1;
+}
+
+static int l_get_nearest(lua::State* L) {
+    auto position = lua::tovec3(L, 1);
+    if (auto player = level->players->getNearest(position)) {
+        lua::pushinteger(L, player->getId());
+        return 1;
+    }
+    return 0;
+}
+
 const luaL_Reg playerlib[] = {
     {"get_pos", lua::wrap<l_get_pos>},
     {"set_pos", lua::wrap<l_set_pos>},
@@ -328,6 +375,8 @@ const luaL_Reg playerlib[] = {
     {"set_instant_destruction", lua::wrap<l_set_instant_destruction>},
     {"is_loading_chunks", lua::wrap<l_is_loading_chunks>},
     {"set_loading_chunks", lua::wrap<l_set_loading_chunks>},
+    {"get_interaction_distance", lua::wrap<l_get_interaction_distance>},
+    {"set_interaction_distance", lua::wrap<l_set_interaction_distance>},
     {"set_selected_slot", lua::wrap<l_set_selected_slot>},
     {"get_selected_block", lua::wrap<l_get_selected_block>},
     {"get_selected_entity", lua::wrap<l_get_selected_entity>},
@@ -341,5 +390,8 @@ const luaL_Reg playerlib[] = {
     {"set_name", lua::wrap<l_set_name>},
     {"create", lua::wrap<l_create>},
     {"delete", lua::wrap<l_delete>},
-    {NULL, NULL}
+    {"get_all_in_radius", lua::wrap<l_get_all_in_radius>},
+    {"get_all", lua::wrap<l_get_all>},
+    {"get_nearest", lua::wrap<l_get_nearest>},
+    {nullptr, nullptr}
 };

src/logic/scripting/lua/libs/libposteffects.cpp

@@ -84,5 +84,5 @@ const luaL_Reg posteffectslib[] = {
     {"is_active", lua::wrap<l_is_active>},
     {"set_params", lua::wrap<l_set_params>},
     {"set_array", lua::wrap<l_set_array>},
-    {NULL, NULL}
+    {nullptr, nullptr}
 };

src/logic/scripting/lua/libs/libquat.cpp

@@ -48,4 +48,5 @@ const luaL_Reg quatlib[] = {
     {"from_mat4", lua::wrap<l_from_mat4>},
     {"slerp", lua::wrap<l_slerp>},
     {"tostring", lua::wrap<l_tostring>},
-    {NULL, NULL}};
+    {nullptr, nullptr}
+};

src/logic/scripting/lua/libs/librandom.cpp

@@ -42,5 +42,5 @@ const luaL_Reg randomlib[] = {
     {"random", lua::wrap<l_random>},
     {"bytes", lua::wrap<l_bytes>},
     {"uuid", lua::wrap<l_uuid>},
-    {NULL, NULL}
+    {nullptr, nullptr}
 };

src/logic/scripting/lua/libs/libtext3d.cpp

@@ -108,5 +108,5 @@ const luaL_Reg text3dlib[] = {
     {"set_axis_y", wrap_hud<l_set_axis_y>},
     {"set_rotation", wrap_hud<l_set_rotation>},
     {"update_settings", wrap_hud<l_update_settings>},
-    {NULL, NULL}
+    {nullptr, nullptr}
 };

src/logic/scripting/lua/libs/libtime.cpp

@@ -68,5 +68,5 @@ const luaL_Reg timelib[] = {
     {"utc_time", lua::wrap<l_utc_time>},
     {"utc_offset", lua::wrap<l_utc_offset>},
     {"local_time", lua::wrap<l_local_time>},
-    {NULL, NULL}
+    {nullptr, nullptr}
 };

src/logic/scripting/lua/libs/libtoml.cpp

@@ -23,5 +23,5 @@ static int l_toml_parse(lua::State* L) {
 const luaL_Reg tomllib[] = {
     {"tostring", lua::wrap<l_toml_stringify>},
     {"parse", lua::wrap<l_toml_parse>},
-    {NULL, NULL}
+    {nullptr, nullptr}
 };

src/logic/scripting/lua/libs/libutf8.cpp

@@ -99,5 +99,5 @@ const luaL_Reg utf8lib[] = {
     {"lower", lua::wrap<l_lower>},
     {"encode", lua::wrap<l_encode>},
     {"escape", lua::wrap<l_escape>},
-    {NULL, NULL}
+    {nullptr, nullptr}
 };

src/logic/scripting/lua/libs/libvecn.cpp

@@ -228,7 +228,8 @@ const luaL_Reg vec2lib[] = {
     {"angle", lua::wrap<l_vec2_angle>},
     {"mix", lua::wrap<l_mix<2>>},
     {"rotate", lua::wrap<l_vec2_rotate>},
-    {NULL, NULL}};
+    {nullptr, nullptr}
+};
 
 const luaL_Reg vec3lib[] = {
     {"add", lua::wrap<l_binop<3, std::plus>>},
@@ -246,7 +247,8 @@ const luaL_Reg vec3lib[] = {
     {"dot", lua::wrap<l_dot<3>>},
     {"spherical_rand", lua::wrap<l_spherical_rand>},
     {"mix", lua::wrap<l_mix<3>>},
-    {NULL, NULL}};
+    {nullptr, nullptr}
+};
 
 const luaL_Reg vec4lib[] = {
     {"add", lua::wrap<l_binop<4, std::plus>>},
@@ -263,4 +265,5 @@ const luaL_Reg vec4lib[] = {
     {"pow", lua::wrap<l_pow<4>>},
     {"dot", lua::wrap<l_dot<4>>},
     {"mix", lua::wrap<l_mix<4>>},
-    {NULL, NULL}};
+    {nullptr, nullptr}
+};

src/logic/scripting/lua/libs/libweather.cpp

@@ -64,5 +64,5 @@ const luaL_Reg weatherlib[] = {
     {"get_current_data", lua::wrap<l_get_current_data>},
     {"get_fall_intensity", lua::wrap<l_get_fall_intensity>},
     {"is_transition", lua::wrap<l_is_transition>},
-    {NULL, NULL}
+    {nullptr, nullptr}
 };

src/logic/scripting/lua/libs/libworld.cpp

@@ -251,5 +251,5 @@ const luaL_Reg worldlib[] = {
     {"save_chunk_data", lua::wrap<l_save_chunk_data>},
     {"count_chunks", lua::wrap<l_count_chunks>},
     {"reload_script", lua::wrap<l_reload_script>},
-    {NULL, NULL}
+    {nullptr, nullptr}
 };

src/logic/scripting/lua/libs/libyaml.cpp

@@ -16,5 +16,5 @@ static int l_parse(lua::State* L) {
 const luaL_Reg yamllib[] = {
     {"tostring", lua::wrap<l_stringify>},
     {"parse", lua::wrap<l_parse>},
-    {NULL, NULL}
+    {nullptr, nullptr}
 };

src/logic/scripting/lua/lua_engine.cpp

@@ -52,6 +52,7 @@ static void create_libs(State* L, StateType stateType) {
     openlib(L, "pack", packlib);
     openlib(L, "quat", quatlib);
     openlib(L, "random", randomlib);
+    openlib(L, "compression", compressionlib);
     openlib(L, "toml", tomllib);
     openlib(L, "utf8", utf8lib);
     openlib(L, "vec2", vec2lib);

src/logic/scripting/lua/lua_extensions.cpp

@@ -1,11 +1,15 @@
 #include <iostream>
 #include <iomanip>
 #include <random>
+#include <sstream>
 
 #include "libs/api_lua.hpp"
 #include "debug/Logger.hpp"
+#include "engine/Engine.hpp"
+#include "devtools/DebuggingServer.hpp"
 #include "logic/scripting/scripting.hpp"
 
+using namespace devtools;
 using namespace scripting;
 
 static debug::Logger logger("lua-debug");
@@ -159,6 +163,223 @@ static int l_math_normal_random(lua::State* L) {
     return lua::pushnumber(L, randomFloats(generator));
 }
 
+constexpr inline int MAX_SHORT_STRING_LEN = 50;
+
+static std::string get_short_value(lua::State* L, int idx, int type) {
+    switch (type) {
+        case LUA_TNIL:
+            return "nil";
+        case LUA_TBOOLEAN:
+            return lua::toboolean(L, idx) ? "true" : "false";
+        case LUA_TNUMBER: {
+            std::stringstream ss;
+            ss << lua::tonumber(L, idx);
+            return ss.str();
+        }
+        case LUA_TSTRING: {
+            const char* str = lua::tostring(L, idx);
+            if (strlen(str) > MAX_SHORT_STRING_LEN) {
+                return std::string(str, MAX_SHORT_STRING_LEN);
+            } else {
+                return str;
+            }
+        }
+        case LUA_TTABLE:
+            return "{...}";
+        case LUA_TFUNCTION: {
+            std::stringstream ss;
+            ss << "function: 0x" << std::hex
+               << reinterpret_cast<ptrdiff_t>(lua::topointer(L, idx));
+            return ss.str();
+        }
+        case LUA_TUSERDATA: {
+            std::stringstream ss;
+            ss << "userdata: 0x" << std::hex
+               << reinterpret_cast<ptrdiff_t>(lua::topointer(L, idx));
+            return ss.str();
+        }
+        case LUA_TTHREAD: {
+            std::stringstream ss;
+            ss << "thread: 0x" << std::hex
+               << reinterpret_cast<ptrdiff_t>(lua::topointer(L, idx));
+            return ss.str();
+        }
+        default: {
+            std::stringstream ss;
+            ss << "cdata: 0x" << std::hex
+               << reinterpret_cast<ptrdiff_t>(lua::topointer(L, idx));
+            return ss.str();
+        }
+    }
+}
+
+static dv::value collect_locals(lua::State* L, lua_Debug& frame) {
+    auto locals = dv::list();
+
+    int localIndex = 1;
+    const char* name;
+    while ((name = lua_getlocal(L, &frame, localIndex++))) {
+        if (name[0] == '(') {
+            lua::pop(L);
+            continue;
+        }
+        auto local = dv::object();
+        local["name"] = name;
+        local["index"] = localIndex - 1;
+
+        int type = lua::type(L, -1);
+        local["type"] = lua::type_name(L, type);
+        local["short"] = get_short_value(L, -1, type);
+        locals.add(std::move(local));
+        lua::pop(L);
+    }
+    return locals;
+}
+
+static dv::value create_stack_trace(lua::State* L, int initFrame = 2) {
+    auto entriesList = dv::list();
+
+    lua_Debug frame;
+    int level = initFrame;
+    
+    while (lua_getstack(L, level, &frame)) {
+        auto entry = dv::object();
+        if (lua_getinfo(L, "nSlf", &frame) == 0) {
+            level++;
+            entriesList.add(std::move(entry));
+            continue;
+        }
+        if (frame.name) {
+            entry["function"] = frame.name;
+        }
+        if (frame.source) {
+            const char* src =
+                (frame.source[0] == '@') ? frame.source + 1 : frame.source;
+            entry["source"] = src;
+            entry["line"] = frame.currentline;
+        }
+        entry["what"] = frame.what;
+        entry["locals"] = collect_locals(L, frame);
+        entriesList.add(std::move(entry));
+        level++;
+    }
+    return entriesList;
+}
+
+static int l_debug_pause(lua::State* L) {
+    if (auto server = engine->getDebuggingServer()) {
+        std::string reason;
+        std::string message;
+        if (lua::isstring(L, 1)) {
+            reason = lua::tolstring(L, 1);
+        }
+        if (lua::isstring(L, 2)) {
+            message = lua::tolstring(L, 2);
+        }
+        server->pause(
+            std::move(reason), std::move(message), create_stack_trace(L)
+        );
+    }
+    return 0;
+}
+
+static int l_debug_sendvalue(lua::State* L) {
+    auto server = engine->getDebuggingServer();
+    if (!server) {
+        return 0;
+    }
+    int frame = lua::tointeger(L, 2);
+    int local = lua::tointeger(L, 3);
+
+    ValuePath path;
+    int pathSectors = lua::objlen(L, 4);
+    for (int i = 0; i < pathSectors; i++) {
+        lua::rawgeti(L, i + 1, 4);
+        if (lua::isstring(L, -1)) {
+            path.emplace_back(lua::tostring(L, -1));
+        } else {
+            path.emplace_back(static_cast<int>(lua::tointeger(L, -1)));
+        }
+        lua::pop(L);
+    }
+
+    dv::value value = nullptr;
+    if (lua::istable(L, 1)) {
+        auto table = dv::object();
+
+        lua::pushnil(L);
+        while (lua::next(L, 1)) {
+            auto key = lua::tolstring(L, -2);
+
+            int type = lua::type(L, -1);
+            table[std::string(key)] = dv::object({
+                {"type", std::string(lua::type_name(L, type))},
+                {"short", get_short_value(L, -1, type)},
+            });
+            lua::pop(L);
+        }
+        lua::pop(L);
+        value = std::move(table);
+    } else {
+        value = lua::tovalue(L, 1);
+    }
+
+    server->sendValue(std::move(value), frame, local, std::move(path));
+    return 0;
+}
+
+static int l_debug_pull_events(lua::State* L) {
+    auto server = engine->getDebuggingServer();
+    if (!server) {
+        return 0;
+    }
+    auto events = server->pullEvents();
+    if (events.empty()) {
+        return 0;
+    }
+    lua::createtable(L, events.size(), 0);
+    for (int i = 0; i < events.size(); i++) {
+        const auto& event = events[i];
+        lua::createtable(L, 3, 0);
+
+        lua::pushinteger(L, static_cast<int>(event.type));
+        lua::rawseti(L, 1);
+
+        if (auto dto = std::get_if<BreakpointEventDto>(&event.data)) {
+            lua::pushstring(L, dto->source);
+            lua::rawseti(L, 2);
+
+            lua::pushinteger(L, dto->line);
+            lua::rawseti(L, 3);
+        } else if (auto dto = std::get_if<GetValueEventDto>(&event.data)) {
+            lua::pushinteger(L, dto->frame);
+            lua::rawseti(L, 2);
+
+            lua::pushinteger(L, dto->localIndex);
+            lua::rawseti(L, 3);
+
+            lua::createtable(L, dto->path.size(), 0);
+            for (int i = 0; i < dto->path.size(); i++) {
+                const auto& segment = dto->path[i];
+                if (auto string = std::get_if<std::string>(&segment)) {
+                    lua::pushstring(L, *string);
+                } else {
+                    lua::pushinteger(L, std::get<int>(segment));
+                }
+                lua::rawseti(L, i + 1);
+            }
+            lua::rawseti(L, 4);
+        }
+
+        lua::rawseti(L, i + 1);
+    }
+    return 1;
+}
+
+static int l_debug_is_debugging(lua::State* L) {
+    return lua::pushboolean(L, engine->getDebuggingServer() != nullptr);
+}
+
 void initialize_libs_extends(lua::State* L) {
     if (lua::getglobal(L, "debug")) {
         lua::pushcfunction(L, lua::wrap<l_debug_error>);
@@ -173,6 +394,18 @@ void initialize_libs_extends(lua::State* L) {
         lua::pushcfunction(L, lua::wrap<l_debug_print>);
         lua::setfield(L, "print");
 
+        lua::pushcfunction(L, lua::wrap<l_debug_pause>);
+        lua::setfield(L, "pause");
+
+        lua::pushcfunction(L, lua::wrap<l_debug_pull_events>);
+        lua::setfield(L, "__pull_events");
+
+        lua::pushcfunction(L, lua::wrap<l_debug_sendvalue>);
+        lua::setfield(L, "__sendvalue");
+
+        lua::pushcfunction(L, lua::wrap<l_debug_is_debugging>);
+        lua::setfield(L, "is_debugging");
+
         lua::pop(L);
     }
     if (lua::getglobal(L, "math")) {

src/logic/scripting/lua/lua_overrides.cpp

@@ -14,7 +14,7 @@ int l_print(lua::State* L) {
         lua::pushvalue(L, i);  /* value to print */
         lua::call(L, 1, 1);
         const char* s = lua::tostring(L, -1); /* get result */
-        if (s == NULL)
+        if (s == nullptr)
             return luaL_error(
                 L,
                 LUA_QL("tostring") " must return a string to " LUA_QL("print")

src/logic/scripting/lua/lua_util.hpp

@@ -249,7 +249,7 @@ namespace lua {
     inline lua::Number tonumber(lua::State* L, int idx) {
 #ifndef NDEBUG
         if (lua_type(L, idx) != LUA_TNUMBER && !lua_isnoneornil(L, idx)) {
-            throw std::runtime_error("integer expected");
+            throw std::runtime_error("number expected");
         }
 #endif
         return lua_tonumber(L, idx);
@@ -617,7 +617,9 @@ namespace lua {
     void remove_environment(lua::State*, int id);
 
     inline void close(lua::State* L) {
-        lua_close(L);
+        if (L) {
+            lua_close(L);
+        }
     }
 
     inline void addfunc(

src/logic/scripting/lua/lua_wrapper.hpp

@@ -50,8 +50,8 @@ namespace lua {
     inline int type(lua::State* L, int idx) {
         return lua_type(L, idx);
     }
-    inline const char* type_name(lua::State* L, int idx) {
-        return lua_typename(L, idx);
+    inline const char* type_name(lua::State* L, int tp) {
+        return lua_typename(L, tp);
     }
     inline int rawget(lua::State* L, int idx = -2) {
         lua_rawget(L, idx);

src/main.cpp

@@ -25,7 +25,7 @@ int main(int argc, char** argv) {
     }
     std::signal(SIGTERM, sigterm_handler);
     
-    debug::Logger::init(coreParameters.userFolder.string()+"/latest.log");
+    debug::Logger::init(coreParameters.userFolder.string() + "/latest.log");
     platform::configure_encoding();
 
     auto& engine = Engine::getInstance();
@@ -33,7 +33,8 @@ int main(int argc, char** argv) {
         engine.initialize(std::move(coreParameters));
         engine.run();
     } catch (const initialize_error& err) {
-        logger.error() << "could not to initialize engine\n" << err.what();
+        logger.error() << err.what();
+        logger.error() << "could not to initialize engine";
     }
 #if defined(NDEBUG) and defined(_WIN32)
     catch (const std::exception& err) {

src/maths/util.hpp

@@ -23,7 +23,7 @@ namespace util {
         PseudoRandom(unsigned short seed) : seed(seed) {}
 
         PseudoRandom() {
-            seed = static_cast<unsigned short>(time(0));
+            seed = static_cast<unsigned short>(time(nullptr));
         }
 
         int rand() {

src/network/Curl.cpp

@@ -0,0 +1,239 @@
+#include "commons.hpp"
+
+#include "debug/Logger.hpp"
+
+#define NOMINMAX
+#include <curl/curl.h>
+#include <queue>
+
+using namespace network;
+
+static debug::Logger logger("curl");
+
+inline constexpr int HTTP_OK = 200;
+inline constexpr int HTTP_BAD_GATEWAY = 502;
+
+static size_t write_callback(
+    char* ptr, size_t size, size_t nmemb, void* userdata
+) {
+    auto& buffer = *reinterpret_cast<std::vector<char>*>(userdata);
+    size_t psize = buffer.size();
+    buffer.resize(psize + size * nmemb);
+    std::memcpy(buffer.data() + psize, ptr, size * nmemb);
+    return size * nmemb;
+}
+
+enum class RequestType {
+    GET, POST
+};
+
+struct Request {
+    RequestType type;
+    std::string url;
+    OnResponse onResponse;
+    OnReject onReject;
+    long maxSize;
+    bool followLocation = false;
+    std::string data;
+    std::vector<std::string> headers;
+};
+
+class CurlRequests : public Requests {
+    CURLM* multiHandle;
+    CURL* curl;
+
+    size_t totalUpload = 0;
+    size_t totalDownload = 0;
+
+    OnResponse onResponse;
+    OnReject onReject;
+    std::vector<char> buffer;
+    std::string url;
+
+    std::queue<Request> requests;
+public:
+    CurlRequests(CURLM* multiHandle, CURL* curl)
+        : multiHandle(multiHandle), curl(curl) {
+    }
+
+    virtual ~CurlRequests() {
+        curl_multi_remove_handle(multiHandle, curl);
+        curl_easy_cleanup(curl);
+        curl_multi_cleanup(multiHandle);
+    }
+    void get(
+        const std::string& url,
+        OnResponse onResponse,
+        OnReject onReject,
+        std::vector<std::string> headers,
+        long maxSize
+    ) override {
+        Request request {
+            RequestType::GET,
+            url,
+            onResponse,
+            onReject,
+            maxSize,
+            true,
+            "",
+            std::move(headers)};
+        processRequest(std::move(request));
+    }
+
+    void post(
+        const std::string& url,
+        const std::string& data,
+        OnResponse onResponse,
+        OnReject onReject=nullptr,
+        std::vector<std::string> headers = {},
+        long maxSize=0
+    ) override {
+        Request request {
+            RequestType::POST,
+            url,
+            onResponse,
+            onReject,
+            maxSize,
+            false,
+            "",
+            std::move(headers)};
+        request.data = data;
+        processRequest(std::move(request));
+    }
+
+    void processRequest(Request request) {
+        if (!url.empty()) {
+            requests.push(request);
+            return;
+        }
+        onResponse = request.onResponse;
+        onReject = request.onReject;
+        url = request.url;
+
+        buffer.clear();
+
+        curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
+        curl_easy_setopt(curl, CURLOPT_POST, request.type == RequestType::POST);
+        
+        curl_slist* hs = nullptr;
+        
+        for (const auto& header : request.headers) {
+            hs = curl_slist_append(hs, header.c_str());
+        }
+
+        switch (request.type) {
+            case RequestType::GET:
+                break;
+            case RequestType::POST: 
+                hs = curl_slist_append(hs, "Content-Type: application/json");
+                curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, request.data.length());
+                curl_easy_setopt(curl, CURLOPT_COPYPOSTFIELDS, request.data.c_str());
+                break;
+            default:
+                throw std::runtime_error("not implemented");
+        }
+        curl_easy_setopt(curl, CURLOPT_HTTPHEADER, hs);
+        curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, request.followLocation);
+        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_callback);
+        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &buffer);
+        curl_easy_setopt(curl, CURLOPT_USERAGENT, "curl/7.81.0");
+        if (request.maxSize == 0) {
+            curl_easy_setopt(
+                curl, CURLOPT_MAXFILESIZE, std::numeric_limits<long>::max()
+            );
+        } else {
+            curl_easy_setopt(curl, CURLOPT_MAXFILESIZE, request.maxSize);
+        }
+        curl_multi_add_handle(multiHandle, curl);
+        int running;
+        CURLMcode res = curl_multi_perform(multiHandle, &running);
+        if (res != CURLM_OK) {
+            auto message = curl_multi_strerror(res);
+            logger.error() << message << " (" << url << ")";
+            if (onReject) {
+                onReject(HTTP_BAD_GATEWAY, {});
+            }
+            url = "";
+        }
+    }
+
+    void update() override {
+        int messagesLeft;
+        int running;
+        CURLMsg* msg;
+        CURLMcode res = curl_multi_perform(multiHandle, &running);
+        if (res != CURLM_OK) {
+            auto message = curl_multi_strerror(res);
+            logger.error() << message << " (" << url << ")";
+            if (onReject) {
+                onReject(HTTP_BAD_GATEWAY, {});
+            }
+            curl_multi_remove_handle(multiHandle, curl);
+            url = "";
+            return;
+        }
+        if ((msg = curl_multi_info_read(multiHandle, &messagesLeft)) != nullptr) {
+            if(msg->msg == CURLMSG_DONE) {
+                curl_multi_remove_handle(multiHandle, curl);
+            }
+            int response;
+            curl_easy_getinfo(msg->easy_handle, CURLINFO_RESPONSE_CODE, &response);
+            if (response == HTTP_OK) {
+                long size;
+                if (!curl_easy_getinfo(curl, CURLINFO_REQUEST_SIZE, &size)) {
+                    totalUpload += size;
+                }
+                if (!curl_easy_getinfo(curl, CURLINFO_HEADER_SIZE, &size)) {
+                    totalDownload += size;
+                }
+                totalDownload += buffer.size();
+                if (onResponse) {
+                    onResponse(std::move(buffer));
+                }
+            } else {
+                logger.error()
+                    << "response code " << response << " (" << url << ")"
+                    << (buffer.empty()
+                            ? ""
+                            : std::to_string(buffer.size()) + " byte(s)");
+                totalDownload += buffer.size();
+                if (onReject) {
+                    onReject(response, std::move(buffer));
+                }
+            }
+            url = "";
+        }
+        if (url.empty() && !requests.empty()) {
+            auto request = std::move(requests.front());
+            requests.pop();
+            processRequest(std::move(request));
+        }
+    }
+
+    size_t getTotalUpload() const override {
+        return totalUpload;
+    }
+
+    size_t getTotalDownload() const override {
+        return totalDownload;
+    }
+
+    static std::unique_ptr<CurlRequests> create() {
+        auto curl = curl_easy_init();
+        if (curl == nullptr) {
+            throw std::runtime_error("could not initialzie cURL");
+        }
+        auto multiHandle = curl_multi_init();
+        if (multiHandle == nullptr) {
+            curl_easy_cleanup(curl);
+            throw std::runtime_error("could not initialzie cURL-multi");
+        }
+        return std::make_unique<CurlRequests>(multiHandle, curl);
+    }
+};
+
+namespace network {
+    std::unique_ptr<Requests> create_curl_requests() {
+        return CurlRequests::create();
+    }
+}

src/network/Network.cpp

@@ -1,853 +1,44 @@
 #include "Network.hpp"
 
-#pragma comment(lib, "Ws2_32.lib")
-
-#define NOMINMAX
-#include <curl/curl.h>
 #include <stdexcept>
 #include <limits>
 #include <queue>
 #include <thread>
 
-#ifdef _WIN32
-/// included in curl.h
-#else
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netdb.h>
-#include <netinet/in.h>
-#include <netinet/tcp.h>
-#include <arpa/inet.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <errno.h>
-
-using SOCKET = int;
-#endif // _WIN32
-
 #include "debug/Logger.hpp"
 #include "util/stringutil.hpp"
 
 using namespace network;
 
-inline constexpr int HTTP_OK = 200;
-inline constexpr int HTTP_BAD_GATEWAY = 502;
-
 static debug::Logger logger("network");
 
-static size_t write_callback(
-    char* ptr, size_t size, size_t nmemb, void* userdata
-) {
-    auto& buffer = *reinterpret_cast<std::vector<char>*>(userdata);
-    size_t psize = buffer.size();
-    buffer.resize(psize + size * nmemb);
-    std::memcpy(buffer.data() + psize, ptr, size * nmemb);
-    return size * nmemb;
-}
+namespace network {
+    std::unique_ptr<Requests> create_curl_requests();
 
-enum class RequestType {
-    GET, POST
-};
-
-struct Request {
-    RequestType type;
-    std::string url;
-    OnResponse onResponse;
-    OnReject onReject;
-    long maxSize;
-    bool followLocation = false;
-    std::string data;
-    std::vector<std::string> headers;
-};
-
-class CurlRequests : public Requests {
-    CURLM* multiHandle;
-    CURL* curl;
-
-    size_t totalUpload = 0;
-    size_t totalDownload = 0;
-
-    OnResponse onResponse;
-    OnReject onReject;
-    std::vector<char> buffer;
-    std::string url;
-
-    std::queue<Request> requests;
-public:
-    CurlRequests(CURLM* multiHandle, CURL* curl)
-        : multiHandle(multiHandle), curl(curl) {
-    }
-
-    virtual ~CurlRequests() {
-        curl_multi_remove_handle(multiHandle, curl);
-        curl_easy_cleanup(curl);
-        curl_multi_cleanup(multiHandle);
-    }
-    void get(
-        const std::string& url,
-        OnResponse onResponse,
-        OnReject onReject,
-        std::vector<std::string> headers,
-        long maxSize
-    ) override {
-        Request request {
-            RequestType::GET,
-            url,
-            onResponse,
-            onReject,
-            maxSize,
-            true,
-            "",
-            std::move(headers)};
-        processRequest(std::move(request));
-    }
-
-    void post(
-        const std::string& url,
-        const std::string& data,
-        OnResponse onResponse,
-        OnReject onReject=nullptr,
-        std::vector<std::string> headers = {},
-        long maxSize=0
-    ) override {
-        Request request {
-            RequestType::POST,
-            url,
-            onResponse,
-            onReject,
-            maxSize,
-            false,
-            "",
-            std::move(headers)};
-        request.data = data;
-        processRequest(std::move(request));
-    }
-
-    void processRequest(Request request) {
-        if (!url.empty()) {
-            requests.push(request);
-            return;
-        }
-        onResponse = request.onResponse;
-        onReject = request.onReject;
-        url = request.url;
-
-        buffer.clear();
-
-        curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
-        curl_easy_setopt(curl, CURLOPT_POST, request.type == RequestType::POST);
-        
-        curl_slist* hs = NULL;
-        
-        for (const auto& header : request.headers) {
-            hs = curl_slist_append(hs, header.c_str());
-        }
-
-        switch (request.type) {
-            case RequestType::GET:
-                break;
-            case RequestType::POST: 
-                hs = curl_slist_append(hs, "Content-Type: application/json");
-                curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, request.data.length());
-                curl_easy_setopt(curl, CURLOPT_COPYPOSTFIELDS, request.data.c_str());
-                break;
-            default:
-                throw std::runtime_error("not implemented");
-        }
-        curl_easy_setopt(curl, CURLOPT_HTTPHEADER, hs);
-        curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, request.followLocation);
-        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_callback);
-        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &buffer);
-        curl_easy_setopt(curl, CURLOPT_USERAGENT, "curl/7.81.0");
-        if (request.maxSize == 0) {
-            curl_easy_setopt(
-                curl, CURLOPT_MAXFILESIZE, std::numeric_limits<long>::max()
-            );
-        } else {
-            curl_easy_setopt(curl, CURLOPT_MAXFILESIZE, request.maxSize);
-        }
-        curl_multi_add_handle(multiHandle, curl);
-        int running;
-        CURLMcode res = curl_multi_perform(multiHandle, &running);
-        if (res != CURLM_OK) {
-            auto message = curl_multi_strerror(res);
-            logger.error() << message << " (" << url << ")";
-            if (onReject) {
-                onReject(HTTP_BAD_GATEWAY, {});
-            }
-            url = "";
-        }
-    }
-
-    void update() override {
-        int messagesLeft;
-        int running;
-        CURLMsg* msg;
-        CURLMcode res = curl_multi_perform(multiHandle, &running);
-        if (res != CURLM_OK) {
-            auto message = curl_multi_strerror(res);
-            logger.error() << message << " (" << url << ")";
-            if (onReject) {
-                onReject(HTTP_BAD_GATEWAY, {});
-            }
-            curl_multi_remove_handle(multiHandle, curl);
-            url = "";
-            return;
-        }
-        if ((msg = curl_multi_info_read(multiHandle, &messagesLeft)) != NULL) {
-            if(msg->msg == CURLMSG_DONE) {
-                curl_multi_remove_handle(multiHandle, curl);
-            }
-            int response;
-            curl_easy_getinfo(msg->easy_handle, CURLINFO_RESPONSE_CODE, &response);
-            if (response == HTTP_OK) {
-                long size;
-                if (!curl_easy_getinfo(curl, CURLINFO_REQUEST_SIZE, &size)) {
-                    totalUpload += size;
-                }
-                if (!curl_easy_getinfo(curl, CURLINFO_HEADER_SIZE, &size)) {
-                    totalDownload += size;
-                }
-                totalDownload += buffer.size();
-                if (onResponse) {
-                    onResponse(std::move(buffer));
-                }
-            } else {
-                logger.error()
-                    << "response code " << response << " (" << url << ")"
-                    << (buffer.empty()
-                            ? ""
-                            : std::to_string(buffer.size()) + " byte(s)");
-                totalDownload += buffer.size();
-                if (onReject) {
-                    onReject(response, std::move(buffer));
-                }
-            }
-            url = "";
-        }
-        if (url.empty() && !requests.empty()) {
-            auto request = std::move(requests.front());
-            requests.pop();
-            processRequest(std::move(request));
-        }
-    }
-
-    size_t getTotalUpload() const override {
-        return totalUpload;
-    }
-
-    size_t getTotalDownload() const override {
-        return totalDownload;
-    }
-
-    static std::unique_ptr<CurlRequests> create() {
-        auto curl = curl_easy_init();
-        if (curl == nullptr) {
-            throw std::runtime_error("could not initialzie cURL");
-        }
-        auto multiHandle = curl_multi_init();
-        if (multiHandle == nullptr) {
-            curl_easy_cleanup(curl);
-            throw std::runtime_error("could not initialzie cURL-multi");
-        }
-        return std::make_unique<CurlRequests>(multiHandle, curl);
-    }
-};
-
-#ifndef _WIN32
-static inline int closesocket(int descriptor) noexcept {
-    return close(descriptor);
-}
-static inline std::runtime_error handle_socket_error(const std::string& message) {
-    int err = errno;
-    return std::runtime_error(
-        message+" [errno=" + std::to_string(err) + "]: " + 
-        std::string(strerror(err))
-    );
-}
-#else
-static inline std::runtime_error handle_socket_error(const std::string& message) {
-    int errorCode = WSAGetLastError();
-    wchar_t* s = nullptr;
-    size_t size = FormatMessageW(
-        FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
-            FORMAT_MESSAGE_IGNORE_INSERTS,
-        nullptr,
-        errorCode,
-        MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
-        (LPWSTR)&s,
-        0,
-        nullptr
-    );
-    assert(s != nullptr);
-    while (size && isspace(s[size-1])) {
-        s[--size] = 0;
-    }
-    auto errorString = util::wstr2str_utf8(std::wstring(s));
-    LocalFree(s);
-    return std::runtime_error(message+" [WSA error=" + 
-           std::to_string(errorCode) + "]: "+errorString);
-}
-#endif
-
-static inline int connectsocket(
-    int descriptor, const sockaddr* addr, socklen_t len
-) noexcept {
-    return connect(descriptor, addr, len);
-}
-
-static inline int recvsocket(
-    int descriptor, char* buf, size_t len
-) noexcept {
-    return recv(descriptor, buf, len, 0);
-}
-
-static inline int sendsocket(
-    int descriptor, const char* buf, size_t len, int flags
-) noexcept {
-    return send(descriptor, buf, len, flags);
-}
-
-static std::string to_string(const sockaddr_in& addr, bool port=true) {
-    char ip[INET_ADDRSTRLEN];
-    if (inet_ntop(AF_INET, &(addr.sin_addr), ip, INET_ADDRSTRLEN)) {
-        return std::string(ip) +
-               (port ? (":" + std::to_string(htons(addr.sin_port))) : "");
-    }
-    return "";
-}
-
-class SocketTcpConnection : public TcpConnection {
-    SOCKET descriptor;
-    sockaddr_in addr;
-    size_t totalUpload = 0;
-    size_t totalDownload = 0;
-    ConnectionState state = ConnectionState::INITIAL;
-    std::unique_ptr<std::thread> thread = nullptr;
-    std::vector<char> readBatch;
-    util::Buffer<char> buffer;
-    std::mutex mutex;
-
-    void connectSocket() {
-        state = ConnectionState::CONNECTING;
-        logger.info() << "connecting to " << to_string(addr);
-        int res = connectsocket(descriptor, (const sockaddr*)&addr, sizeof(sockaddr_in));
-        if (res < 0) {
-            auto error = handle_socket_error("Connect failed");
-            closesocket(descriptor);
-            state = ConnectionState::CLOSED;
-            logger.error() << error.what();
-            return;
-        }
-        logger.info() << "connected to " << to_string(addr);
-        state = ConnectionState::CONNECTED;
-    }
-public:
-    SocketTcpConnection(SOCKET descriptor, sockaddr_in addr)
-        : descriptor(descriptor), addr(std::move(addr)), buffer(16'384) {}
-
-    ~SocketTcpConnection() {
-        if (state != ConnectionState::CLOSED) {
-            shutdown(descriptor, 2);
-        }
-        if (thread) {
-            thread->join();
-        }
-    }
-
-    void startListen() {
-        while (state == ConnectionState::CONNECTED) {
-            int size = recvsocket(descriptor, buffer.data(), buffer.size());
-            if (size == 0) {
-                logger.info() << "closed connection with " << to_string(addr);
-                closesocket(descriptor);
-                state = ConnectionState::CLOSED;
-                break;
-            } else if (size < 0) {
-                logger.warning() << "an error ocurred while receiving from "
-                            << to_string(addr);
-                auto error = handle_socket_error("recv(...) error");
-                closesocket(descriptor);
-                state = ConnectionState::CLOSED;
-                logger.error() << error.what();
-                break;
-            }
-            {
-                std::lock_guard lock(mutex);
-                for (size_t i = 0; i < size; i++) {
-                    readBatch.emplace_back(buffer[i]);
-                }
-                totalDownload += size;
-            }
-        }
-    }
-
-    void startClient() {
-        state = ConnectionState::CONNECTED;
-        thread = std::make_unique<std::thread>([this]() { startListen();});
-    }
-
-    void connect(runnable callback) override {
-        thread = std::make_unique<std::thread>([this, callback]() {
-            connectSocket();
-            if (state == ConnectionState::CONNECTED) {
-                callback();
-            }
-            startListen();
-        });
-    }
-
-    int recv(char* buffer, size_t length) override {
-        std::lock_guard lock(mutex);
-
-        if (state != ConnectionState::CONNECTED && readBatch.empty()) {
-            return -1;
-        }
-        int size = std::min(readBatch.size(), length);
-        std::memcpy(buffer, readBatch.data(), size);
-        readBatch.erase(readBatch.begin(), readBatch.begin() + size);
-        return size;
-    }
-
-    int send(const char* buffer, size_t length) override {
-        if (state == ConnectionState::CLOSED) {
-            return 0;
-        }
-        int len = sendsocket(descriptor, buffer, length, 0);
-        if (len == -1) {
-            int err = errno;
-            close();
-            throw std::runtime_error(
-                "Send failed [errno=" + std::to_string(err) + "]: "
-                 + std::string(strerror(err))
-            );
-        }
-        totalUpload += len;
-        return len;
-    }
-
-    int available() override {
-        std::lock_guard lock(mutex);
-        return readBatch.size();
-    }
-
-    void close(bool discardAll=false) override {
-        {
-            std::lock_guard lock(mutex);
-            readBatch.clear();
-
-            if (state != ConnectionState::CLOSED) {
-                shutdown(descriptor, 2);
-                closesocket(descriptor);
-            }
-        }
-        if (thread) {
-            thread->join();
-            thread = nullptr;
-        }
-    }
-
-    size_t pullUpload() override {
-        size_t size = totalUpload;
-        totalUpload = 0;
-        return size;
-    }
-
-    size_t pullDownload() override {
-        size_t size = totalDownload;
-        totalDownload = 0;
-        return size;
-    }
-
-    int getPort() const override {
-        return htons(addr.sin_port);
-    }
-
-    std::string getAddress() const override {
-        return to_string(addr, false);
-    }
-
-    static std::shared_ptr<SocketTcpConnection> connect(
+    std::shared_ptr<TcpConnection> connect_tcp(
         const std::string& address, int port, runnable callback
-    ) {
-        addrinfo hints {};
+    );
 
-        hints.ai_family = AF_INET;
-        hints.ai_socktype = SOCK_STREAM;
-
-        addrinfo* addrinfo = nullptr;
-        if (int res = getaddrinfo(
-            address.c_str(), nullptr, &hints, &addrinfo
-        )) {
-            throw std::runtime_error(gai_strerror(res));
-        }
-
-        sockaddr_in serverAddress;
-        std::memcpy(&serverAddress, addrinfo->ai_addr, sizeof(sockaddr_in));
-        serverAddress.sin_port = htons(port);
-        freeaddrinfo(addrinfo);
-
-        SOCKET descriptor = socket(AF_INET, SOCK_STREAM, 0);
-        if (descriptor == -1) {
-            throw std::runtime_error("Could not create socket");
-        }
-        auto socket = std::make_shared<SocketTcpConnection>(descriptor, std::move(serverAddress));
-        socket->connect(std::move(callback));
-        return socket;
-    }
-
-    ConnectionState getState() const override {
-        return state;
-    }
-};
-
-class SocketTcpServer : public TcpServer {
-    u64id_t id;
-    Network* network;
-    SOCKET descriptor;
-    std::vector<u64id_t> clients;
-    std::mutex clientsMutex;
-    bool open = true;
-    std::unique_ptr<std::thread> thread = nullptr;
-    int port;
-public:
-    SocketTcpServer(u64id_t id, Network* network, SOCKET descriptor, int port)
-    : id(id), network(network), descriptor(descriptor), port(port) {}
-
-    ~SocketTcpServer() {
-        closeSocket();
-    }
-
-    void startListen(ConnectCallback handler) override {
-        thread = std::make_unique<std::thread>([this, handler]() {
-            while (open) {
-                logger.info() << "listening for connections";
-                if (listen(descriptor, 2) < 0) {
-                    close();
-                    break;
-                }
-                socklen_t addrlen = sizeof(sockaddr_in);
-                SOCKET clientDescriptor;
-                sockaddr_in address;
-                logger.info() << "accepting clients";
-                if ((clientDescriptor = accept(descriptor, (sockaddr*)&address, &addrlen)) == -1) {
-                    close();
-                    break;
-                }
-                logger.info() << "client connected: " << to_string(address);
-                auto socket = std::make_shared<SocketTcpConnection>(
-                    clientDescriptor, address
-                );
-                socket->startClient();
-                u64id_t id = network->addConnection(socket);
-                {
-                    std::lock_guard lock(clientsMutex);
-                    clients.push_back(id);
-                }
-                handler(this->id, id);
-            }
-        });
-    }
-    
-    void closeSocket() {
-        if (!open) {
-            return;
-        }
-        logger.info() << "closing server";
-        open = false;
-
-        {
-            std::lock_guard lock(clientsMutex);
-            for (u64id_t clientid : clients) {
-                if (auto client = network->getConnection(clientid)) {
-                    client->close();
-                }
-            }
-        }
-        clients.clear();
-
-        shutdown(descriptor, 2);
-        closesocket(descriptor);
-        thread->join();
-    }
-
-    void close() override {
-        closeSocket();
-    }
-    
-    bool isOpen() override {
-        return open;
-    }
-
-    int getPort() const override {
-        return port;
-    }
-
-    static std::shared_ptr<SocketTcpServer> openServer(
+    std::shared_ptr<TcpServer> open_tcp_server(
         u64id_t id, Network* network, int port, ConnectCallback handler
-    ) {
-        SOCKET descriptor = socket(
-            AF_INET, SOCK_STREAM, 0
-        );
-        if (descriptor == -1) {
-            throw std::runtime_error("Could not create server socket");
-        }
-        int opt = 1;
-        int flags = SO_REUSEADDR;
-#       if !defined(_WIN32) && !defined(__APPLE__)
-            flags |= SO_REUSEPORT;
-#       endif
-        if (setsockopt(descriptor, SOL_SOCKET, flags, (const char*)&opt, sizeof(opt))) {
-            logger.error() << "setsockopt(SO_REUSEADDR) failed with errno: "
-             << errno << "(" << std::strerror(errno) << ")";
-            closesocket(descriptor);
-            throw std::runtime_error("setsockopt");
-        }
-        sockaddr_in address;
-        address.sin_family = AF_INET;
-        address.sin_addr.s_addr = INADDR_ANY;
-        address.sin_port = htons(port);
-        if (bind(descriptor, (sockaddr*)&address, sizeof(address)) < 0) {
-            closesocket(descriptor);
-            throw std::runtime_error("could not bind port "+std::to_string(port));
-        }
-        logger.info() << "opened server at port " << port;
-        auto server =
-            std::make_shared<SocketTcpServer>(id, network, descriptor, port);
-        server->startListen(std::move(handler));
-        return server;
-    }
-};
+    );
 
-static sockaddr_in resolve_address_dgram(const std::string& address, int port) {
-    sockaddr_in serverAddr{};
-    addrinfo hints {};
-
-    hints.ai_family = AF_INET;
-    hints.ai_socktype = SOCK_DGRAM;
-
-    addrinfo* addrinfo = nullptr;
-    if (int res = getaddrinfo(
-        address.c_str(), nullptr, &hints, &addrinfo
-    )) {
-        throw std::runtime_error(gai_strerror(res));
-    }
-
-    std::memcpy(&serverAddr, addrinfo->ai_addr, sizeof(sockaddr_in));
-    serverAddr.sin_port = htons(port);
-    freeaddrinfo(addrinfo);
-    return serverAddr;
-}
-
-class SocketUdpConnection : public UdpConnection {
-    u64id_t id;
-    SOCKET descriptor;
-    sockaddr_in addr{};
-    bool open = true;
-    std::unique_ptr<std::thread> thread;
-    ClientDatagramCallback callback;
-
-    size_t totalUpload = 0;
-    size_t totalDownload = 0;
-    ConnectionState state = ConnectionState::INITIAL;
-
-public:
-    SocketUdpConnection(u64id_t id, SOCKET descriptor, sockaddr_in addr)
-        : id(id), descriptor(descriptor), addr(std::move(addr)) {}
-
-    ~SocketUdpConnection() override {
-        SocketUdpConnection::close();
-    }
-
-    static std::shared_ptr<SocketUdpConnection> connect(
+    std::shared_ptr<UdpConnection> connect_udp(
         u64id_t id,
         const std::string& address,
         int port,
         ClientDatagramCallback handler,
         runnable callback
-    ) {
-        SOCKET descriptor = socket(AF_INET, SOCK_DGRAM, 0);
-        if (descriptor == -1) {
-            throw std::runtime_error("could not create udp socket");
-        }
+    );
 
-        sockaddr_in serverAddr = resolve_address_dgram(address, port);
+    std::shared_ptr<UdpServer> open_udp_server(
+        u64id_t id,
+        Network* network,
+        int port,
+        const ServerDatagramCallback& handler
+    );
+}
 
-        if (::connect(descriptor, (sockaddr*)&serverAddr, sizeof(serverAddr)) < 0) {
-            auto err = handle_socket_error("udp connect failed");
-            closesocket(descriptor);
-            throw err;
-        }
-
-        auto socket = std::make_shared<SocketUdpConnection>(id, descriptor, serverAddr);
-        socket->connect(std::move(handler));
-
-        callback();
-
-        return socket;
-    }
-
-    void connect(ClientDatagramCallback handler) override {
-        callback = std::move(handler);
-        state = ConnectionState::CONNECTED;
-
-        thread = std::make_unique<std::thread>([this]() {
-            util::Buffer<char> buffer(16'384);
-            while (open) {
-                int size = recv(descriptor, buffer.data(), buffer.size(), 0);
-                if (size <= 0) {
-                    logger.error() << "udp connection " << id
-                                   << handle_socket_error(" recv error").what();
-                    if (!open) break;
-                    closesocket(descriptor);
-                    state = ConnectionState::CLOSED;
-                    break;
-                }
-                totalDownload += size;
-                if (callback) {
-                    callback(id, buffer.data(), size);
-                }
-            }
-        });
-    }
-
-    int send(const char* buffer, size_t length) override {
-        int len = ::send(descriptor, buffer, length, 0);
-        if (len < 0) {
-            auto err = handle_socket_error(" send failed");
-            closesocket(descriptor);
-            state = ConnectionState::CLOSED;
-            logger.error() << "udp connection " << id << err.what();
-        } else totalUpload += len;
-
-        return len;
-    }
-
-    void close(bool discardAll=false) override {
-        if (!open) return;
-        open = false;
-        logger.info() << "closing udp connection "<< id;
-
-        if (state != ConnectionState::CLOSED) {
-            shutdown(descriptor, 2);
-            closesocket(descriptor);
-        }
-
-        if (thread) {
-            thread->join();
-            thread.reset();
-        }
-        state = ConnectionState::CLOSED;
-    }
-
-    size_t pullUpload() override {
-        size_t s = totalUpload;
-        totalUpload = 0;
-        return s;
-    }
-
-    size_t pullDownload() override {
-        size_t s = totalDownload;
-        totalDownload = 0;
-        return s;
-    }
-
-    [[nodiscard]] int getPort() const override {
-        return ntohs(addr.sin_port);
-    }
-
-    [[nodiscard]] std::string getAddress() const override {
-        return to_string(addr, false);
-    }
-
-    [[nodiscard]] ConnectionState getState() const override {
-        return state;
-    }
-};
-
-class SocketUdpServer : public UdpServer {
-    u64id_t id;
-    SOCKET descriptor;
-    bool open = true;
-    std::unique_ptr<std::thread> thread = nullptr;
-    int port;
-    ServerDatagramCallback callback;
-
-public:
-    SocketUdpServer(u64id_t id, Network* network, SOCKET descriptor, int port)
-        : id(id), descriptor(descriptor), port(port) {}
-
-    ~SocketUdpServer() override {
-        SocketUdpServer::close();
-    }
-
-    void startListen(ServerDatagramCallback handler) override {
-        callback = std::move(handler);
-
-        thread = std::make_unique<std::thread>([this]() {
-            util::Buffer<char> buffer(16384);
-            sockaddr_in clientAddr{};
-            socklen_t addrlen = sizeof(clientAddr);
-
-            while (open) {
-                int size = recvfrom(descriptor, buffer.data(), buffer.size(), 0,
-                                    reinterpret_cast<sockaddr*>(&clientAddr), &addrlen);
-                if (size <= 0) {
-                    if (!open) break;
-                    continue;
-                }
-
-                std::string addrStr = to_string(clientAddr, false);
-                int port = ntohs(clientAddr.sin_port);
-
-                callback(id, addrStr, port, buffer.data(), size);
-            }
-        });
-    }
-
-    void sendTo(const std::string& addr, int port, const char* buffer, size_t length) override {
-        sockaddr_in client = resolve_address_dgram(addr, port);
-        if (sendto(descriptor, buffer, length, 0,
-               reinterpret_cast<sockaddr*>(&client), sizeof(client)) < 0) {
-            logger.error() << handle_socket_error("sendto").what();
-        }
-    }
-
-    void close() override {
-        if (!open) return;
-        open = false;
-        shutdown(descriptor, 2);
-        closesocket(descriptor);
-        if (thread) {
-            thread->join();
-            thread = nullptr;
-        }
-    }
-
-    bool isOpen() override { return open; }
-    int getPort() const override { return port; }
-
-    static std::shared_ptr<SocketUdpServer> openServer(
-        u64id_t id, Network* network, int port, const ServerDatagramCallback& handler
-    ) {
-        SOCKET descriptor = socket(AF_INET, SOCK_DGRAM, 0);
-        if (descriptor == -1) throw std::runtime_error("could not create udp socket");
-
-        sockaddr_in address{};
-        address.sin_family = AF_INET;
-        address.sin_addr.s_addr = INADDR_ANY;
-        address.sin_port = htons(port);
-
-        if (bind(descriptor, (sockaddr*)&address, sizeof(address)) < 0) {
-            closesocket(descriptor);
-            throw std::runtime_error("could not bind udp port " + std::to_string(port));
-        }
-
-        auto server = std::make_shared<SocketUdpServer>(id, network, descriptor, port);
-        server->startListen(std::move(handler));
-        return server;
-    }
-};
 
 Network::Network(std::unique_ptr<Requests> requests)
 : requests(std::move(requests)) {
@@ -878,19 +69,19 @@ void Network::post(
     );
 }
 
-Connection* Network::getConnection(u64id_t id) {
+Connection* Network::getConnection(u64id_t id, bool includePrivate) {
     std::lock_guard lock(connectionsMutex);
 
     const auto& found = connections.find(id);
-    if (found == connections.end()) {
+    if (found == connections.end() || (!includePrivate && found->second->isPrivate())) {
         return nullptr;
     }
     return found->second.get();
 }
 
-Server* Network::getServer(u64id_t id) const {
+Server* Network::getServer(u64id_t id, bool includePrivate) const {
     const auto& found = servers.find(id);
-    if (found == servers.end()) {
+    if (found == servers.end() || (!includePrivate && found->second->isPrivate())) {
         return nullptr;
     }
     return found->second.get();
@@ -900,7 +91,7 @@ u64id_t Network::connectTcp(const std::string& address, int port, consumer<u64id
     std::lock_guard lock(connectionsMutex);
     
     u64id_t id = nextConnection++;
-    auto socket = SocketTcpConnection::connect(address, port, [id, callback]() {
+    auto socket = connect_tcp(address, port, [id, callback]() {
         callback(id);
     });
     connections[id] = std::move(socket);
@@ -909,16 +100,21 @@ u64id_t Network::connectTcp(const std::string& address, int port, consumer<u64id
 
 u64id_t Network::openTcpServer(int port, ConnectCallback handler) {
     u64id_t id = nextServer++;
-    auto server = SocketTcpServer::openServer(id, this, port, handler);
+    auto server = open_tcp_server(id, this, port, handler);
     servers[id] = std::move(server);
     return id;
 }
 
-u64id_t Network::connectUdp(const std::string& address, int port, const consumer<u64id_t>& callback, ClientDatagramCallback handler) {
+u64id_t Network::connectUdp(
+    const std::string& address,
+    int port,
+    const consumer<u64id_t>& callback,
+    ClientDatagramCallback handler
+) {
     std::lock_guard lock(connectionsMutex);
 
     u64id_t id = nextConnection++;
-    auto socket = SocketUdpConnection::connect(id, address, port, std::move(handler), [id, callback]() {
+    auto socket = connect_udp(id, address, port, std::move(handler), [id, callback]() {
         callback(id);
     });
     connections[id] = std::move(socket);
@@ -927,7 +123,7 @@ u64id_t Network::connectUdp(const std::string& address, int port, const consumer
 
 u64id_t Network::openUdpServer(int port, const ServerDatagramCallback& handler) {
     u64id_t id = nextServer++;
-    auto server = SocketUdpServer::openServer(id, this, port, handler);
+    auto server = open_udp_server(id, this, port, handler);
     servers[id] = std::move(server);
     return id;
 }
@@ -968,19 +164,19 @@ void Network::update() {
             }
             ++socketiter;
         }
-        auto serveriter = servers.begin();
-        while (serveriter != servers.end()) {
-            auto server = serveriter->second.get();
-            if (!server->isOpen()) {
-                serveriter = servers.erase(serveriter);
-                continue;
-            }
-            ++serveriter;
+    }
+    auto serveriter = servers.begin();
+    while (serveriter != servers.end()) {
+        auto server = serveriter->second.get();
+        if (!server->isOpen()) {
+            serveriter = servers.erase(serveriter);
+            continue;
         }
+        server->update();
+        ++serveriter;
     }
 }
 
 std::unique_ptr<Network> Network::create(const NetworkSettings& settings) {
-    auto requests = CurlRequests::create();
-    return std::make_unique<Network>(std::move(requests));
+    return std::make_unique<Network>(network::create_curl_requests());
 }

src/network/Network.hpp

@@ -1,83 +1,16 @@
 #pragma once
 
-#include <memory>
-#include <vector>
-#include <mutex>
-
-#include "typedefs.hpp"
-#include "settings.hpp"
-#include "util/Buffer.hpp"
-#include "delegates.hpp"
+#include "commons.hpp"
 
 namespace network {
-    using OnResponse = std::function<void(std::vector<char>)>;
-    using OnReject = std::function<void(int, std::vector<char>)>;
-    using ConnectCallback = std::function<void(u64id_t, u64id_t)>;
-    using ServerDatagramCallback = std::function<void(u64id_t sid, const std::string& addr, int port, const char* buffer, size_t length)>;
-    using ClientDatagramCallback = std::function<void(u64id_t cid, const char* buffer, size_t length)>;
-
-
-    class Requests {
-    public:
-        virtual ~Requests() {}
-
-        virtual void get(
-            const std::string& url,
-            OnResponse onResponse,
-            OnReject onReject=nullptr,
-            std::vector<std::string> headers = {},
-            long maxSize=0
-        ) = 0;
-
-        virtual void post(
-            const std::string& url,
-            const std::string& data,
-            OnResponse onResponse,
-            OnReject onReject=nullptr,
-            std::vector<std::string> headers = {},
-            long maxSize=0
-        ) = 0;
-
-        [[nodiscard]] virtual size_t getTotalUpload() const = 0;
-        [[nodiscard]] virtual size_t getTotalDownload() const = 0;
-
-        virtual void update() = 0;
-    };
-
-    enum class ConnectionState {
-        INITIAL, CONNECTING, CONNECTED, CLOSED
-    };
-
-    enum class TransportType {
-        TCP, UDP
-    };
-
-    class Connection {
-    public:
-        virtual ~Connection() = default;
-
-        virtual void close(bool discardAll=false) = 0;
-
-        virtual int send(const char* buffer, size_t length) = 0;
-
-        virtual size_t pullUpload() = 0;
-        virtual size_t pullDownload() = 0;
-
-        [[nodiscard]] virtual int getPort() const = 0;
-        [[nodiscard]] virtual std::string getAddress() const = 0;
-
-        [[nodiscard]] virtual ConnectionState getState() const = 0;
-
-        [[nodiscard]] virtual TransportType getTransportType() const noexcept = 0;
-    };
-
-    class TcpConnection : public Connection {
+    class TcpConnection : public ReadableConnection {
     public:
         ~TcpConnection() override = default;
 
         virtual void connect(runnable callback) = 0;
-        virtual int recv(char* buffer, size_t length) = 0;
-        virtual int available() = 0;
+
+        virtual void setNoDelay(bool noDelay) = 0;
+        [[nodiscard]] virtual bool isNoDelay() const = 0;
 
         [[nodiscard]] TransportType getTransportType() const noexcept override {
             return TransportType::TCP;
@@ -95,15 +28,6 @@ namespace network {
         }
     };
 
-    class Server {
-    public:
-        virtual ~Server() = default;
-        virtual void close() = 0;
-        virtual bool isOpen() = 0;
-        [[nodiscard]] virtual TransportType getTransportType() const noexcept = 0;
-        [[nodiscard]] virtual int getPort() const = 0;
-    };
-
     class TcpServer : public Server {
     public:
         ~TcpServer() override {}
@@ -112,6 +36,8 @@ namespace network {
         [[nodiscard]] TransportType getTransportType() const noexcept override {
             return TransportType::TCP;
         }
+
+        virtual void setMaxClientsConnected(int count) = 0;
     };
 
     class UdpServer : public Server {
@@ -159,8 +85,8 @@ namespace network {
             long maxSize=0
         );
 
-        [[nodiscard]] Connection* getConnection(u64id_t id);
-        [[nodiscard]] Server* getServer(u64id_t id) const;
+        [[nodiscard]] Connection* getConnection(u64id_t id, bool includePrivate);
+        [[nodiscard]] Server* getServer(u64id_t id, bool includePrivate) const;
 
         u64id_t connectTcp(const std::string& address, int port, consumer<u64id_t> callback);
         u64id_t connectUdp(const std::string& address, int port, const consumer<u64id_t>& callback, ClientDatagramCallback handler);

src/network/Sockets.cpp

@@ -0,0 +1,704 @@
+#include "commons.hpp"
+
+#pragma comment(lib, "Ws2_32.lib")
+
+#define NOMINMAX
+#include <stdexcept>
+#include <limits>
+#include <queue>
+#include <thread>
+
+#ifdef _WIN32
+#include <curl/curl.h>
+#define SHUT_RDWR SD_BOTH
+#else
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+
+using SOCKET = int;
+#endif // _WIN32
+
+#include "Network.hpp"
+#include "util/stringutil.hpp"
+#include "debug/Logger.hpp"
+
+using namespace network;
+
+static debug::Logger logger("sockets");
+
+#ifndef _WIN32
+static inline int closesocket(int descriptor) noexcept {
+    return close(descriptor);
+}
+static inline std::runtime_error handle_socket_error(const std::string& message) {
+    int err = errno;
+    return std::runtime_error(
+        message+" [errno=" + std::to_string(err) + "]: " + 
+        std::string(strerror(err))
+    );
+}
+#else
+static inline std::runtime_error handle_socket_error(const std::string& message) {
+    int errorCode = WSAGetLastError();
+    wchar_t* s = nullptr;
+    size_t size = FormatMessageW(
+        FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
+            FORMAT_MESSAGE_IGNORE_INSERTS,
+        nullptr,
+        errorCode,
+        MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+        (LPWSTR)&s,
+        0,
+        nullptr
+    );
+    assert(s != nullptr);
+    while (size && isspace(s[size-1])) {
+        s[--size] = 0;
+    }
+    auto errorString = util::wstr2str_utf8(std::wstring(s));
+    LocalFree(s);
+    return std::runtime_error(message+" [WSA error=" + 
+           std::to_string(errorCode) + "]: "+errorString);
+}
+#endif
+
+static inline int connectsocket(
+    int descriptor, const sockaddr* addr, socklen_t len
+) noexcept {
+    return connect(descriptor, addr, len);
+}
+
+static inline int recvsocket(
+    int descriptor, char* buf, size_t len
+) noexcept {
+    return recv(descriptor, buf, len, 0);
+}
+
+static inline int sendsocket(
+    int descriptor, const char* buf, size_t len, int flags
+) noexcept {
+    return send(descriptor, buf, len, flags);
+}
+
+static std::string to_string(const sockaddr_in& addr, bool port=true) {
+    char ip[INET_ADDRSTRLEN];
+    if (inet_ntop(AF_INET, &(addr.sin_addr), ip, INET_ADDRSTRLEN)) {
+        return std::string(ip) +
+               (port ? (":" + std::to_string(htons(addr.sin_port))) : "");
+    }
+    return "";
+}
+
+class SocketTcpConnection : public TcpConnection {
+    SOCKET descriptor;
+    sockaddr_in addr;
+    size_t totalUpload = 0;
+    size_t totalDownload = 0;
+    ConnectionState state = ConnectionState::INITIAL;
+    std::unique_ptr<std::thread> thread = nullptr;
+    std::vector<char> readBatch;
+    util::Buffer<char> buffer;
+    std::mutex mutex;
+
+    void connectSocket() {
+        state = ConnectionState::CONNECTING;
+        logger.info() << "connecting to " << to_string(addr);
+        int res = connectsocket(descriptor, (const sockaddr*)&addr, sizeof(sockaddr_in));
+        if (res < 0) {
+            auto error = handle_socket_error("Connect failed");
+            closesocket(descriptor);
+            state = ConnectionState::CLOSED;
+            logger.error() << error.what();
+            return;
+        }
+        logger.info() << "connected to " << to_string(addr);
+        state = ConnectionState::CONNECTED;
+    }
+public:
+    SocketTcpConnection(SOCKET descriptor, sockaddr_in addr)
+        : descriptor(descriptor), addr(std::move(addr)), buffer(16'384) {}
+
+    ~SocketTcpConnection() {
+        if (state != ConnectionState::CLOSED) {
+            shutdown(descriptor, 2);
+        }
+        if (thread) {
+            thread->join();
+        }
+    }
+
+    void setNoDelay(bool noDelay) override {
+        int opt = noDelay ? 1 : 0;
+        if (setsockopt(descriptor, IPPROTO_TCP, TCP_NODELAY, (char*)&opt, sizeof(opt)) < 0) {
+            throw handle_socket_error("setsockopt(TCP_NODELAY) failed");
+        }
+    }
+
+    bool isNoDelay() const override {
+        int opt = 0;
+        socklen_t len = sizeof(opt);
+        if (getsockopt(descriptor, IPPROTO_TCP, TCP_NODELAY, (char*)&opt, &len) < 0) {
+            throw handle_socket_error("getsockopt(TCP_NODELAY) failed");
+        }
+        return opt != 0;
+    }
+
+    void startListen() {
+        while (state == ConnectionState::CONNECTED) {
+            int size = recvsocket(descriptor, buffer.data(), buffer.size());
+            if (size == 0) {
+                logger.info() << "closed connection with " << to_string(addr);
+                closesocket(descriptor);
+                state = ConnectionState::CLOSED;
+                break;
+            } else if (size < 0) {
+                logger.warning() << "an error ocurred while receiving from "
+                            << to_string(addr);
+                auto error = handle_socket_error("recv(...) error");
+                closesocket(descriptor);
+                state = ConnectionState::CLOSED;
+                logger.error() << error.what();
+                break;
+            }
+            {
+                std::lock_guard lock(mutex);
+                for (size_t i = 0; i < size; i++) {
+                    readBatch.emplace_back(buffer[i]);
+                }
+                totalDownload += size;
+            }
+        }
+    }
+
+    void startClient() {
+        state = ConnectionState::CONNECTED;
+        thread = std::make_unique<std::thread>([this]() { startListen();});
+    }
+
+    void connect(runnable callback) override {
+        thread = std::make_unique<std::thread>([this, callback]() {
+            connectSocket();
+            if (state == ConnectionState::CONNECTED) {
+                callback();
+            }
+            startListen();
+        });
+    }
+
+    int recv(char* buffer, size_t length) override {
+        std::lock_guard lock(mutex);
+
+        if (state != ConnectionState::CONNECTED && readBatch.empty()) {
+            return -1;
+        }
+        int size = std::min(readBatch.size(), length);
+        std::memcpy(buffer, readBatch.data(), size);
+        readBatch.erase(readBatch.begin(), readBatch.begin() + size);
+        return size;
+    }
+
+    int send(const char* buffer, size_t length) override {
+        if (state == ConnectionState::CLOSED) {
+            return 0;
+        }
+        int len = sendsocket(descriptor, buffer, length, 0);
+        if (len == -1) {
+            int err = errno;
+            close();
+            throw std::runtime_error(
+                "Send failed [errno=" + std::to_string(err) + "]: "
+                 + std::string(strerror(err))
+            );
+        }
+        totalUpload += len;
+        return len;
+    }
+
+    int available() override {
+        std::lock_guard lock(mutex);
+        return readBatch.size();
+    }
+
+    void close(bool discardAll=false) override {
+        {
+            std::lock_guard lock(mutex);
+            readBatch.clear();
+
+            if (state != ConnectionState::CLOSED) {
+                shutdown(descriptor, SHUT_RDWR);
+                closesocket(descriptor);
+            }
+        }
+        if (thread) {
+            thread->join();
+            thread = nullptr;
+        }
+    }
+
+    size_t pullUpload() override {
+        size_t size = totalUpload;
+        totalUpload = 0;
+        return size;
+    }
+
+    size_t pullDownload() override {
+        size_t size = totalDownload;
+        totalDownload = 0;
+        return size;
+    }
+
+    int getPort() const override {
+        return htons(addr.sin_port);
+    }
+
+    std::string getAddress() const override {
+        return to_string(addr, false);
+    }
+
+    static std::shared_ptr<SocketTcpConnection> connect(
+        const std::string& address, int port, runnable callback
+    ) {
+        addrinfo hints {};
+
+        hints.ai_family = AF_INET;
+        hints.ai_socktype = SOCK_STREAM;
+
+        addrinfo* addrinfo = nullptr;
+        if (int res = getaddrinfo(
+            address.c_str(), nullptr, &hints, &addrinfo
+        )) {
+            throw std::runtime_error(gai_strerror(res));
+        }
+
+        sockaddr_in serverAddress;
+        std::memcpy(&serverAddress, addrinfo->ai_addr, sizeof(sockaddr_in));
+        serverAddress.sin_port = htons(port);
+        freeaddrinfo(addrinfo);
+
+        SOCKET descriptor = socket(AF_INET, SOCK_STREAM, 0);
+        if (descriptor == -1) {
+            throw std::runtime_error("Could not create socket");
+        }
+        auto socket = std::make_shared<SocketTcpConnection>(descriptor, std::move(serverAddress));
+        socket->connect(std::move(callback));
+        return socket;
+    }
+
+    ConnectionState getState() const override {
+        return state;
+    }
+};
+
+class SocketTcpServer : public TcpServer {
+    u64id_t id;
+    Network* network;
+    SOCKET descriptor;
+    std::vector<u64id_t> clients;
+    std::mutex clientsMutex;
+    bool open = true;
+    std::unique_ptr<std::thread> thread = nullptr;
+    int port;
+    int maxConnected = -1;
+public:
+    SocketTcpServer(u64id_t id, Network* network, SOCKET descriptor, int port)
+    : id(id), network(network), descriptor(descriptor), port(port) {}
+
+    ~SocketTcpServer() {
+        closeSocket();
+    }
+
+    void setMaxClientsConnected(int count) override {
+        maxConnected = count;
+    }
+
+    void update() override {
+        std::vector<u64id_t> clients;
+        for (u64id_t cid : this->clients) {
+            if (auto client = network->getConnection(cid, true)) {
+                if (client->getState() != ConnectionState::CLOSED) {
+                    clients.emplace_back(cid);
+                }
+            }
+        }
+        std::swap(clients, this->clients);
+    }
+
+    void startListen(ConnectCallback handler) override {
+        thread = std::make_unique<std::thread>([this, handler]() {
+            while (open) {
+                logger.info() << "listening for connections";
+                if (listen(descriptor, 2) < 0) {
+                    close();
+                    break;
+                }
+                socklen_t addrlen = sizeof(sockaddr_in);
+                SOCKET clientDescriptor;
+                sockaddr_in address;
+                logger.info() << "accepting clients";
+                if ((clientDescriptor = accept(descriptor, (sockaddr*)&address, &addrlen)) == -1) {
+                    close();
+                    break;
+                }
+                if (maxConnected >= 0 && clients.size() >= maxConnected) {
+                    logger.info() << "refused connection attempt from " << to_string(address);
+                    closesocket(clientDescriptor);
+                    continue;
+                }
+                logger.info() << "client connected: " << to_string(address);
+                auto socket = std::make_shared<SocketTcpConnection>(
+                    clientDescriptor, address
+                );
+                socket->startClient();
+                u64id_t id = network->addConnection(socket);
+                {
+                    std::lock_guard lock(clientsMutex);
+                    clients.push_back(id);
+                }
+                handler(this->id, id);
+            }
+        });
+    }
+    
+    void closeSocket() {
+        if (!open) {
+            return;
+        }
+        logger.info() << "closing server";
+        open = false;
+
+        {
+            std::lock_guard lock(clientsMutex);
+            for (u64id_t clientid : clients) {
+                if (auto client = network->getConnection(clientid, true)) {
+                    client->close();
+                }
+            }
+        }
+        clients.clear();
+
+        shutdown(descriptor, 2);
+        closesocket(descriptor);
+        thread->join();
+    }
+
+    void close() override {
+        closeSocket();
+    }
+    
+    bool isOpen() override {
+        return open;
+    }
+
+    int getPort() const override {
+        return port;
+    }
+
+    static std::shared_ptr<SocketTcpServer> openServer(
+        u64id_t id, Network* network, int port, ConnectCallback handler
+    ) {
+        SOCKET descriptor = socket(
+            AF_INET, SOCK_STREAM, 0
+        );
+        if (descriptor == -1) {
+            throw std::runtime_error("Could not create server socket");
+        }
+        int opt = 1;
+        int flags = SO_REUSEADDR;
+#       if !defined(_WIN32) && !defined(__APPLE__)
+            flags |= SO_REUSEPORT;
+#       endif
+        if (setsockopt(descriptor, SOL_SOCKET, flags, (const char*)&opt, sizeof(opt))) {
+            logger.error() << "setsockopt(SO_REUSEADDR) failed with errno: "
+             << errno << "(" << std::strerror(errno) << ")";
+            closesocket(descriptor);
+            throw std::runtime_error("setsockopt");
+        }
+        sockaddr_in address;
+        address.sin_family = AF_INET;
+        address.sin_addr.s_addr = INADDR_ANY;
+        address.sin_port = htons(port);
+        if (bind(descriptor, (sockaddr*)&address, sizeof(address)) < 0) {
+            closesocket(descriptor);
+            throw std::runtime_error("could not bind port "+std::to_string(port));
+        }
+        logger.info() << "opened server at port " << port;
+        auto server =
+            std::make_shared<SocketTcpServer>(id, network, descriptor, port);
+        server->startListen(std::move(handler));
+        return server;
+    }
+};
+
+static sockaddr_in resolve_address_dgram(const std::string& address, int port) {
+    sockaddr_in serverAddr{};
+    addrinfo hints {};
+
+    hints.ai_family = AF_INET;
+    hints.ai_socktype = SOCK_DGRAM;
+
+    addrinfo* addrinfo = nullptr;
+    if (int res = getaddrinfo(
+        address.c_str(), nullptr, &hints, &addrinfo
+    )) {
+        throw std::runtime_error(gai_strerror(res));
+    }
+
+    std::memcpy(&serverAddr, addrinfo->ai_addr, sizeof(sockaddr_in));
+    serverAddr.sin_port = htons(port);
+    freeaddrinfo(addrinfo);
+    return serverAddr;
+}
+
+class SocketUdpConnection : public UdpConnection {
+    u64id_t id;
+    SOCKET descriptor;
+    sockaddr_in addr{};
+    bool open = true;
+    std::unique_ptr<std::thread> thread;
+    ClientDatagramCallback callback;
+
+    size_t totalUpload = 0;
+    size_t totalDownload = 0;
+    ConnectionState state = ConnectionState::INITIAL;
+
+public:
+    SocketUdpConnection(u64id_t id, SOCKET descriptor, sockaddr_in addr)
+        : id(id), descriptor(descriptor), addr(std::move(addr)) {}
+
+    ~SocketUdpConnection() override {
+        SocketUdpConnection::close();
+    }
+
+    static std::shared_ptr<SocketUdpConnection> connect(
+        u64id_t id,
+        const std::string& address,
+        int port,
+        ClientDatagramCallback handler,
+        runnable callback
+    ) {
+        SOCKET descriptor = socket(AF_INET, SOCK_DGRAM, 0);
+        if (descriptor == -1) {
+            throw std::runtime_error("could not create udp socket");
+        }
+
+        sockaddr_in serverAddr = resolve_address_dgram(address, port);
+
+        if (::connect(descriptor, (sockaddr*)&serverAddr, sizeof(serverAddr)) < 0) {
+            auto err = handle_socket_error("udp connect failed");
+            closesocket(descriptor);
+            throw err;
+        }
+
+        auto socket = std::make_shared<SocketUdpConnection>(id, descriptor, serverAddr);
+        socket->connect(std::move(handler));
+
+        callback();
+
+        return socket;
+    }
+
+    void connect(ClientDatagramCallback handler) override {
+        callback = std::move(handler);
+        state = ConnectionState::CONNECTED;
+
+        thread = std::make_unique<std::thread>([this]() {
+            util::Buffer<char> buffer(16'384);
+            while (open) {
+                int size = recv(descriptor, buffer.data(), buffer.size(), 0);
+                if (size <= 0) {
+                    logger.error() << "udp connection " << id
+                                   << handle_socket_error(" recv error").what();
+                    if (!open) break;
+                    closesocket(descriptor);
+                    state = ConnectionState::CLOSED;
+                    break;
+                }
+                totalDownload += size;
+                if (callback) {
+                    callback(id, buffer.data(), size);
+                }
+            }
+        });
+    }
+
+    int send(const char* buffer, size_t length) override {
+        int len = ::send(descriptor, buffer, length, 0);
+        if (len < 0) {
+            auto err = handle_socket_error(" send failed");
+            closesocket(descriptor);
+            state = ConnectionState::CLOSED;
+            logger.error() << "udp connection " << id << err.what();
+        } else totalUpload += len;
+
+        return len;
+    }
+
+    void close(bool discardAll=false) override {
+        if (!open) return;
+        open = false;
+        logger.info() << "closing udp connection "<< id;
+
+        if (state != ConnectionState::CLOSED) {
+            shutdown(descriptor, 2);
+            closesocket(descriptor);
+        }
+
+        if (thread) {
+            thread->join();
+            thread.reset();
+        }
+        state = ConnectionState::CLOSED;
+    }
+
+    size_t pullUpload() override {
+        size_t s = totalUpload;
+        totalUpload = 0;
+        return s;
+    }
+
+    size_t pullDownload() override {
+        size_t s = totalDownload;
+        totalDownload = 0;
+        return s;
+    }
+
+    [[nodiscard]] int getPort() const override {
+        return ntohs(addr.sin_port);
+    }
+
+    [[nodiscard]] std::string getAddress() const override {
+        return to_string(addr, false);
+    }
+
+    [[nodiscard]] ConnectionState getState() const override {
+        return state;
+    }
+};
+
+class SocketUdpServer : public UdpServer {
+    u64id_t id;
+    SOCKET descriptor;
+    bool open = true;
+    std::unique_ptr<std::thread> thread = nullptr;
+    int port;
+    ServerDatagramCallback callback;
+
+public:
+    SocketUdpServer(u64id_t id, Network* network, SOCKET descriptor, int port)
+        : id(id), descriptor(descriptor), port(port) {}
+
+    ~SocketUdpServer() override {
+        SocketUdpServer::close();
+    }
+
+    void update() override {}
+
+    void startListen(ServerDatagramCallback handler) override {
+        callback = std::move(handler);
+
+        thread = std::make_unique<std::thread>([this]() {
+            util::Buffer<char> buffer(16384);
+            sockaddr_in clientAddr{};
+            socklen_t addrlen = sizeof(clientAddr);
+
+            while (open) {
+                int size = recvfrom(descriptor, buffer.data(), buffer.size(), 0,
+                                    reinterpret_cast<sockaddr*>(&clientAddr), &addrlen);
+                if (size <= 0) {
+                    if (!open) break;
+                    continue;
+                }
+
+                std::string addrStr = to_string(clientAddr, false);
+                int port = ntohs(clientAddr.sin_port);
+
+                callback(id, addrStr, port, buffer.data(), size);
+            }
+        });
+    }
+
+    void sendTo(const std::string& addr, int port, const char* buffer, size_t length) override {
+        sockaddr_in client = resolve_address_dgram(addr, port);
+        if (sendto(descriptor, buffer, length, 0,
+               reinterpret_cast<sockaddr*>(&client), sizeof(client)) < 0) {
+            logger.error() << handle_socket_error("sendto").what();
+        }
+    }
+
+    void close() override {
+        if (!open) return;
+        open = false;
+        shutdown(descriptor, 2);
+        closesocket(descriptor);
+        if (thread) {
+            thread->join();
+            thread = nullptr;
+        }
+    }
+
+    bool isOpen() override { return open; }
+    int getPort() const override { return port; }
+
+    static std::shared_ptr<SocketUdpServer> openServer(
+        u64id_t id, Network* network, int port, const ServerDatagramCallback& handler
+    ) {
+        SOCKET descriptor = socket(AF_INET, SOCK_DGRAM, 0);
+        if (descriptor == -1) throw std::runtime_error("could not create udp socket");
+
+        sockaddr_in address{};
+        address.sin_family = AF_INET;
+        address.sin_addr.s_addr = INADDR_ANY;
+        address.sin_port = htons(port);
+
+        if (bind(descriptor, (sockaddr*)&address, sizeof(address)) < 0) {
+            closesocket(descriptor);
+            throw std::runtime_error("could not bind udp port " + std::to_string(port));
+        }
+
+        auto server = std::make_shared<SocketUdpServer>(id, network, descriptor, port);
+        server->startListen(std::move(handler));
+        return server;
+    }
+};
+
+namespace network {
+    std::shared_ptr<TcpConnection> connect_tcp(
+        const std::string& address, int port, runnable callback
+    ) {
+        return SocketTcpConnection::connect(address, port, std::move(callback));
+    }
+
+    std::shared_ptr<TcpServer> open_tcp_server(
+        u64id_t id, Network* network, int port, ConnectCallback handler
+    ) {
+        return SocketTcpServer::openServer(id, network, port, std::move(handler));
+    }
+
+    std::shared_ptr<UdpConnection> connect_udp(
+        u64id_t id,
+        const std::string& address,
+        int port,
+        ClientDatagramCallback handler,
+        runnable callback
+    ) {
+        return SocketUdpConnection::connect(
+            id, address, port, std::move(handler), std::move(callback)
+        );
+    }
+
+    std::shared_ptr<UdpServer> open_udp_server(
+        u64id_t id,
+        Network* network,
+        int port,
+        const ServerDatagramCallback& handler
+    ) {
+        return SocketUdpServer::openServer(id, network, port, handler);
+    }
+}

src/network/commons.hpp

@@ -0,0 +1,99 @@
+#pragma once
+
+#include "typedefs.hpp"
+#include "settings.hpp"
+#include "util/Buffer.hpp"
+#include "delegates.hpp"
+
+#include <memory>
+#include <vector>
+#include <mutex>
+
+namespace network {
+    using OnResponse = std::function<void(std::vector<char>)>;
+    using OnReject = std::function<void(int, std::vector<char>)>;
+    using ConnectCallback = std::function<void(u64id_t, u64id_t)>;
+    using ServerDatagramCallback = std::function<void(u64id_t sid, const std::string& addr, int port, const char* buffer, size_t length)>;
+    using ClientDatagramCallback = std::function<void(u64id_t cid, const char* buffer, size_t length)>;
+
+    class Requests {
+    public:
+        virtual ~Requests() {}
+
+        virtual void get(
+            const std::string& url,
+            OnResponse onResponse,
+            OnReject onReject=nullptr,
+            std::vector<std::string> headers = {},
+            long maxSize=0
+        ) = 0;
+
+        virtual void post(
+            const std::string& url,
+            const std::string& data,
+            OnResponse onResponse,
+            OnReject onReject=nullptr,
+            std::vector<std::string> headers = {},
+            long maxSize=0
+        ) = 0;
+
+        [[nodiscard]] virtual size_t getTotalUpload() const = 0;
+        [[nodiscard]] virtual size_t getTotalDownload() const = 0;
+
+        virtual void update() = 0;
+    };
+
+    enum class ConnectionState {
+        INITIAL, CONNECTING, CONNECTED, CLOSED
+    };
+
+    enum class TransportType {
+        TCP, UDP
+    };
+
+    class Connection {
+    public:
+        virtual ~Connection() = default;
+
+        virtual void close(bool discardAll=false) = 0;
+
+        virtual int send(const char* buffer, size_t length) = 0;
+
+        virtual size_t pullUpload() = 0;
+        virtual size_t pullDownload() = 0;
+
+        bool isPrivate() const { return isprivate; }
+        void setPrivate(bool flag) {isprivate = flag;}
+
+        [[nodiscard]] virtual int getPort() const = 0;
+        [[nodiscard]] virtual std::string getAddress() const = 0;
+
+        [[nodiscard]] virtual ConnectionState getState() const = 0;
+
+        [[nodiscard]] virtual TransportType getTransportType() const noexcept = 0;
+    protected:
+        bool isprivate = false;
+    };
+
+    class ReadableConnection : public Connection {
+    public:
+        virtual int recv(char* buffer, size_t length) = 0;
+        virtual int available() = 0;
+    };
+
+    class Server {
+    public:
+        virtual ~Server() = default;
+
+        virtual void update() = 0;
+        virtual void close() = 0;
+        virtual bool isOpen() = 0;
+        [[nodiscard]] virtual TransportType getTransportType() const noexcept = 0;
+        [[nodiscard]] virtual int getPort() const = 0;
+
+        bool isPrivate() const { return isprivate; }
+        void setPrivate(bool flag) { isprivate = flag; }
+    protected:
+        bool isprivate = false;
+    };
+}

src/objects/Player.cpp

@@ -196,6 +196,14 @@ void Player::setLoadingChunks(bool flag) {
     loadingChunks = flag;
 }
 
+float Player::getMaxInteractionDistance() const {
+    return interactionDistance;
+}
+
+void Player::setMaxInteractionDistance(float distance) {
+    interactionDistance = std::max(1.0f, std::min(200.0f, distance));
+}
+
 entityid_t Player::getEntity() const {
     return eid;
 }
@@ -250,6 +258,7 @@ dv::value Player::serialize() const {
     root["rotation"] = dv::to_value(rotation);
     root["spawnpoint"] = dv::to_value(spawnpoint);
 
+    root["interaction-distance"] = interactionDistance;
     root["flight"] = flight;
     root["noclip"] = noclip;
     root["suspended"] = suspended;
@@ -283,6 +292,8 @@ void Player::deserialize(const dv::value& src) {
     const auto& sparr = src["spawnpoint"];
     setSpawnPoint(glm::vec3(
         sparr[0].asNumber(), sparr[1].asNumber(), sparr[2].asNumber()));
+    
+    src.at("interaction-distance").get(interactionDistance);
 
     flight = src["flight"].asBoolean();
     noclip = src["noclip"].asBoolean();

src/objects/Player.hpp

@@ -46,6 +46,7 @@ class Player : public Serializable {
     int64_t id;
     std::string name;
     float speed;
+    
     int chosenSlot;
     glm::vec3 position;
     glm::vec3 spawnpoint {};
@@ -56,6 +57,8 @@ class Player : public Serializable {
     bool infiniteItems = true;
     bool instantDestruction = true;
     bool loadingChunks = true;
+    float interactionDistance = 10.0f;
+
     entityid_t eid = ENTITY_AUTO;
     entityid_t selectedEid = 0;
 
@@ -90,6 +93,7 @@ public:
     void setChosenSlot(int index);
 
     int getChosenSlot() const;
+
     float getSpeed() const;
 
     bool isSuspended() const;
@@ -110,6 +114,9 @@ public:
     bool isLoadingChunks() const;
     void setLoadingChunks(bool flag);
 
+    float getMaxInteractionDistance() const;
+    void setMaxInteractionDistance(float distance);
+
     entityid_t getEntity() const;
     void setEntity(entityid_t eid);
 

src/objects/Players.cpp

@@ -1,5 +1,8 @@
 #include "Players.hpp"
 
+#define GLM_ENABLE_EXPERIMENTAL
+#include <glm/gtx/norm.hpp>
+
 #include "Player.hpp"
 #include "items/Inventories.hpp"
 #include "world/Level.hpp"
@@ -20,6 +23,48 @@ Player* Players::get(int64_t id) const {
     return found->second.get();
 }
 
+std::vector<Player*> Players::getAllInRadius(
+    const glm::vec3& center, float radius
+) const {
+    std::vector<Player*> foundPlayers;
+
+    for (const auto& pair : players) {
+        auto player = pair.second.get();
+        auto relativePos = player->getPosition() - center;
+        if (!player->isSuspended() && glm::length2(relativePos) <= radius) {
+            foundPlayers.emplace_back(player);
+        }
+    }
+    return foundPlayers;
+}
+
+std::vector<Player*> Players::getAll() const {
+    std::vector<Player*> allPlayers;
+    allPlayers.reserve(players.size());
+    for (const auto& pair : players) {
+        allPlayers.emplace_back(pair.second.get());
+    }
+    return allPlayers;
+}
+
+Player* Players::getNearest(const glm::vec3& position) const {
+    Player* nearest = nullptr;
+    float nearestDist2 = std::numeric_limits<float>::max();
+    for (const auto& pair : players) {
+        auto player = pair.second.get();
+        if (player->isSuspended()) {
+            continue;
+        }
+        auto relativePos = player->getPosition() - position;
+        auto dist2 = glm::length2(relativePos);
+        if (dist2 < nearestDist2) {
+            nearestDist2 = dist2;
+            nearest = player;
+        }
+    }
+    return nearest;
+}
+
 Player* Players::create(int64_t id) {
     int64_t& nextPlayerID = level.getWorld()->getInfo().nextPlayerId;
     if (id == NONE) {

src/objects/Players.hpp

@@ -1,7 +1,9 @@
 #pragma once
 
 #include <memory>
+#include <vector>
 #include <unordered_map>
+#include <glm/vec3.hpp>
 
 #include "typedefs.hpp"
 #include "interfaces/Serializable.hpp"
@@ -34,6 +36,10 @@ public:
 
     void remove(int64_t id);
 
+    std::vector<Player*> getAllInRadius(const glm::vec3& center, float radius) const;
+    std::vector<Player*> getAll() const;
+    Player* getNearest(const glm::vec3& position) const;
+
     dv::value serialize() const override;
 
     void deserialize(const dv::value& src) override;

src/objects/Transform.cpp

@@ -2,6 +2,8 @@
 
 #include "data/dv_util.hpp"
 
+#include <glm/gtc/matrix_transform.hpp>
+
 void Transform::refresh() {
     combined = glm::mat4(1.0f);
     combined = glm::translate(combined, pos);

src/settings.hpp

@@ -19,8 +19,8 @@ struct AudioSettings {
 };
 
 struct DisplaySettings {
-    /// @brief Is window in full screen mode
-    FlagSetting fullscreen {false};
+    /// @brief Window mode (windowed/fullscreen/borderless)
+    IntegerSetting windowMode {0, 0, 2};
     /// @brief Window width (pixels)
     IntegerSetting width {1280};
     /// @brief Window height (pixels)

src/util/ArgsReader.hpp

@@ -33,5 +33,14 @@ namespace util {
             last = argv[pos];
             return argv[pos++];
         }
+
+        int nextInt() {
+            auto text = next();
+            try {
+                return std::stoi(text);
+            } catch (const std::exception& e) {
+                throw std::runtime_error(e.what());
+            }
+        }
     };
 }

src/util/command_line.cpp

@@ -4,6 +4,7 @@
 #include <functional>
 #include <vector>
 #include <string>
+#include <iomanip>
 
 #include "io/engine_paths.hpp"
 #include "util/ArgsReader.hpp"
@@ -15,10 +16,17 @@ class ArgC {
     public:
         std::string keyword;
         std::function<bool()> execute;
+        std::string args;
         std::string help;
-        ArgC(const std::string& keyword, std::function<bool()> execute, const std::string& help) {
+        ArgC(
+            const std::string& keyword,
+            std::function<bool()> execute,
+            const std::string& args,
+            const std::string& help
+        ) {
             this->keyword = keyword;
             this->execute = execute;
+            this->args = args;
             this->help = help;
         }
 };
@@ -31,42 +39,51 @@ static bool perform_keyword(
         ArgC("--res", [&params, &reader]() -> bool {
             params.resFolder = reader.next();
             return true;
-        }, "<path> - set resources directory."),
+        }, "<path>", "set resources directory."),
         ArgC("--dir", [&params, &reader]() -> bool {
             params.userFolder = reader.next();
             return true;
-        }, "<path> - set userfiles directory."),
+        }, "<path>", "set userfiles directory."),
         ArgC("--project", [&params, &reader]() -> bool {
             params.projectFolder = reader.next();
             return true;
-        }, "<path> - set project directory."),
+        }, "<path>", "set project directory."),
         ArgC("--test", [&params, &reader]() -> bool {
             params.testMode = true;
             params.scriptFile = reader.next();
             return true;
-        }, "<path> - test script file."),
+        }, "<path>", "test script file."),
         ArgC("--script", [&params, &reader]() -> bool {
             params.testMode = false;
             params.scriptFile = reader.next();
             return true;
-        }, "<path> - main script file."),
+        }, "<path>", "main script file."),
         ArgC("--headless", [&params]() -> bool {
             params.headless = true;
             return true;
-        }, "- run in headless mode."),
+        }, "", "run in headless mode."),
+        ArgC("--tps", [&params, &reader]() -> bool {
+            params.tps = reader.nextInt();
+            return true;
+        }, "<tps>", "headless mode tick-rate (default - 20)."),
         ArgC("--version", []() -> bool {
             std::cout << ENGINE_VERSION_STRING << std::endl;
             return false;
-        }, "- display the engine version."),
+        }, "", "display the engine version."),
+        ArgC("--dbg-server", [&params, &reader]() -> bool {
+            params.debugServerString = reader.next();
+            return true;
+        }, "<serv>", "open debugging server where <serv> is {transport}:{port}"),
         ArgC("--help", []() -> bool {
             std::cout << "VoxelCore v" << ENGINE_VERSION_STRING << "\n\n";
             std::cout << "Command-line arguments:\n";
             for (auto& a : argumentsCommandline) {
-                std::cout << a.keyword << " " << a.help << std::endl;
+                std::cout << std::setw(24) << std::left << (a.keyword + " " + a.args);
+                std::cout << "- " << a.help << std::endl;
             }
             std::cout << std::endl;
             return false;
-        }, "- display this help.")
+        }, "", "display this help.")
     };
     for (auto& a : argumentsCommandline) {
         if (a.keyword == keyword) {